HT204409 Many People Report Improved Performance Turning off WMM.

I am confused by http://support.apple.com/kb/TS3727
On my NetGear WNR834 router I turned off WMM and got dramatically improved download speeds - from <1MBps to over 20MBps. No other changes - just that one setting. I got the same improvement on my iPhone 4S, iPad II, and even a Samsung Galaxy Tab. All the devices connected before the change and have connected successfully after.
Apparently many others had the same experience - see the dialogue at https://discussions.apple.com/message/11366976#11366976.
Has the advice in the above Tech Support response been validated? Is there some downside that I have not yet experienced?
Thanks.

Hello All -
I have been searching the issue of writing/updating .XMP data files trying to get an idea of it's merits vs potential problems. With more than one search leading me to this thread I hope I am in the correct thread. I'll be honest and say that since the V1.1 release, I'm scrambling for information and understanding. Watching the vid's and reading all the .pdf I can get continues to keep me unsure on what seem to be very basic settings and practices.
Would any consider it good practice with the new catalog system to break up one's existing V1.0 database (now large catalog file) into smaller catalog's? Or, keep an all inclusive catalog as we did with 1.0?
It seems most do not choose to autowrite .xmp in settings. I followed that path when setting up V1.1. Noting that I am still using the one large catalog file created on upgrade, should I have synchronized my metadata at some point? Most of my photos show "resolve conflict" in the right panel metadata field. Should I do one large "synch" and if so any advice from the experienced on how best to manage/update, if needed, this synchronization would be greatly appreciated.
I have not experienced many of the slow-downs or processor usage some have spoken of. I have approx 2500 pics (with 5000 to come) that where in one large v1.0 file. Now it seems I can break this file up and fully use both my XPSGen2 PIV 2.4ghz Centrino, 2gbRAM with approx 200gb of space between my HD and a Maxtor 3200 USB?
With the specs listed on the above post, it looks like Lightroom will need much more spec than what I have.?.?.? Comments welcome.
Again, I hope this is the correct thread for this post and have made myself as clear as a slightly confused can. ;-)
Thanks!
B

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HT204409 Many People Report Improved Performance Turning off WMM.

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