Are slow smb transfers normal?

Hi All,
As I write this, I am trying to transfer 23 GB of data from my local drive to an smb share on a Linux file server. This and other transfers I have made to smb shares are stupefyingly slow: about 1/20 the speed my Linux and Windows machines will do the same transfer (100 base-T). Is this normal for 10.6.4?
Many thanks,
-T
ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.168.255.184 netmask 0xffffff00 broadcast 192.168.255.255
media: autoselect (100baseTX <full-duplex,flow-control>)
status: active

Some people reporting this problem have traced it back to the good old Nagle algorithm. The following page has something to try on the MacOS X side as well as some possible fixes on the Linux Samba server side.
http://blog.julipedia.org/2006/02/samba-performance-under-mac-os-x.html
I was trying to transfer her documents and Thunderbird profile.
Thank you for the link. I could not locate an /etc/sysctl.conf file, so I create one and rebooted. No joy.
I did find:
http://forums.whirlpool.net.au/archive/965569, and
http://discussions.apple.com/thread.jspa?threadID=1424000&tstart=0
Supposedly, it is just bug that has yet to be fixed in Snow Leopard. Hopefully the user I turn this thing over to will not notice it when operating on single files. She needs Adobe's (yes elderly) CS3, which run well on Mac.
Thank you for all the help. And sorry for the cranky old man stuff.
-T
sudo sysctl -w net.inet.tcp.delayed_ack=0
net.inet.tcp.delayed_ack: 0 -> 0

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    Launch Agents: ℹ️
      [running] com.abbott.mal.launchclient.plist Support
      [loaded] org.gpgtools.gpgmail.enable-bundles.plist Support
      [loaded] org.gpgtools.gpgmail.patch-uuid-user.plist Support
      [loaded] org.gpgtools.Libmacgpg.xpc.plist Support
      [loaded] org.gpgtools.macgpg2.fix.plist Support
      [running] org.gpgtools.macgpg2.shutdown-gpg-agent.plist Support
      [loaded] org.gpgtools.macgpg2.updater.plist Support
    Launch Daemons: ℹ️
      [running] com.abbott.mal.malserver.plist Support
      [loaded] com.adobe.fpsaud.plist Support
      [running] com.freemacsoft.appcleanerd.plist Support
      [loaded] com.microsoft.office.licensing.helper.plist Support
      [running] com.wdc.SmartwareDriveService.plist Support
      [running] com.wdc.WDSmartWareService.plist Support
      [loaded] org.gpgtools.gpgmail.patch-uuid.plist Support
      [not loaded] org.virtualbox.startup.plist Support
    User Launch Agents: ℹ️
      [loaded] com.adobe.ARM.[...].plist Support
      [loaded] com.google.keystone.agent.plist Support
      [invalid?] com.macpaw.CleanMyMac.trashSizeWatcher.plist Support
      [invalid?] com.macpaw.CleanMyMac.volumeWatcher.plist Support
      [loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist Support
      [failed] com.macpaw.CleanMyMac2Helper.trashWatcher.plist Support
      [running] com.vladalexa.MagicPrefs.plist Support
      [not loaded] org.virtualbox.vboxwebsrv.plist Support
      [running] ws.agile.1PasswordAgent.plist Support
    User Login Items: ℹ️
      AppCleaner Helper Application (/Applications/AppCleaner.app/Contents/Library/LoginItems/AppCleaner Helper.app)
      Messages Application (/Applications/Messages.app)
      MagicPrefs UNKNOWN (missing value)
      Calendar ApplicationHidden (/Applications/Calendar.app)
      Mail ApplicationHidden (/Applications/Mail.app)
      Contacts ApplicationHidden (/Applications/Contacts.app)
      PowerboxInjector Application (/Applications/PowerboxInjector.app)
    Internet Plug-ins: ℹ️
      LogitechHarmony: Version: 2.0 - SDK 10.7 Support
      DirectorShockwave: Version: 12.0.4r144 - SDK 10.6 Support
      Google Earth Web Plug-in: Version: 6.0 Support
      Default Browser: Version: 600 - SDK 10.10
      Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
      OfficeLiveBrowserPlugin: Version: 12.2.0 Support
      Silverlight: Version: 5.1.20913.0 - SDK 10.6 Support
      FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
      Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
      iPhotoPhotocast: Version: 7.0
      QuickTime Plugin: Version: 7.7.3
      SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6 Support
      AdobePDFViewer: Version: 9.5.5 Support
      GarminGpsControl: Version: 4.2.0.0 - SDK 10.8 Support
      EPPEX Plugin: Version: 4.1.0.0 Support
      JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
    Safari Extensions: ℹ️
      1Password
      AdBlock
      ClickToFlash (Disabled)
      Print Plus (Disabled)
      ClickToPlugin (Disabled)
      OpenIE
    3rd Party Preference Panes: ℹ️
      Flash Player  Support
      Flip4Mac WMV  Support
      GPGPreferences  Support
      Growl  Support
      MacFUSE (Tuxera)  Support
      MagicPrefs  Support
      Paragon NTFS for Mac ® OS X  Support
      Perian  Support
      QuickTime Player X Preferences  Support
      WDQuickView  Support
    Time Machine: ℹ️
      Skip System Files: NO
      Mobile backups: OFF
      Auto backup: YES
      Destinations:
      Time Machine Backups [Local]
      Total size: 795.40 GB
      Total number of backups: 29
      Oldest backup: 2014-10-08 20:15:48 +0000
      Last backup: 2014-10-20 17:32:33 +0000
      Size of backup disk: Excellent
      Backup size 795.40 GB > (Disk size 0 B X 3)
    Top Processes by CPU: ℹ️
          10% WindowServer
          5% syncdefaultsd
          4% Safari
          1% AppleSpell
          0% com.apple.iCloudHelper
    Top Processes by Memory: ℹ️
      266 MB mds_stores
      258 MB Safari
      180 MB Finder
      137 MB WindowServer
      136 MB com.apple.WebKit.WebContent
    Virtual Memory Information: ℹ️
      3.93 GB Free RAM
      2.97 GB Active RAM
      443 MB Inactive RAM
      978 MB Wired RAM
      1.82 GB Page-ins
      0 B Page-outs

    You could do that, but when setting up your new iMac it is a much better idea to transfer only your existing User Accounts. In other words when Setup Assistant appears, de-select "Applications", "Computer and Network Settings" and "Other files and folders". That way you will eliminate the possibility of reinstalling potentially incompatible software from your existing Mac or its TM backup. It's best to create new printer queues and preferences anyway.
    Your venerable HP 1012 will probably work without any difficulty but if you need its driver download it here. If it gives you trouble try OS X's generic PostScript driver.
    After configuring your user account, install original versions of your essential software from their original sources. In other words if you installed them via download from the developer's website, download them again. You might need license keys so gather them. Obviously the Mac App Store makes things easy since anything you obtain from there is already linked to your Apple ID and is easily reinstalled by going to your Purchases page.
    Don't reinstall things like AppCleaner, CleanMyMac, Western Digital "Smartware" or any of that junk. You don't need it. MacFUSE is outdated. Research Prolific Technology for potential updates for their serial controller. The one you have may work, or not, but you should re-download its driver.
    Consider abandoning Microsoft altogether and migrating to better solutions such as Pages, Numbers, and Keynote. They are all free with a purchase of a new Mac and are far more integrated with OS X than anything Microsoft will ever be able to accomplish.
    The Burr-Brown USB device is unknown to me, so research TI's website for support if you need it.
    If your essential software was distributed on optical media, you can use OS X's "DVD or CD sharing" feature to remotely mount the older iMac's optical drive so that you can install its software. It will work as though that drive were physically installed on your new Mac. Having said that, anything that was distributed on optical media is highly likely to have been outdated a long time ago.
    If your essential software is old, orphaned, no longer supported, or is no longer available, meaning you have the only viable copy, the only option is to transfer it from the TM backup or older Mac. In that case be very cognizant of the likelihood for incompatibility, and have a plan for uninstalling it should it cause adverse effects. Creating a new TM backup is the way to do that. A new external HD dedicated to the new Mac is a cheap investment. When you are certain you no longer require the older Mac's TM backup, you can erase it and use it as an additional, redundant TM backup or "clone" repository – whichever you decide is best for your backup needs.

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