Exceedingly slow download speeds on brand new mbp os lion

Hi,
There seems to be a lot of posted issues with slow download speeds on the MBP. I purchased mine 2 weeks ago (Oct 2011), a 13" core i7. My download speeds are a tiny fraction of what I get with a 10 year old Dell. Reading the posts on this issue, they all seem to be going in circles. I am technically very savvy although new to apple. I did at one point get an acceptable increase in download speeds after manually entering the gateway, subnet and DNS. However two days later download speeds have reduced from 17.8 MB/s to 37kb/s. The right now the Dell is screaming a 702MB download. The MBP slug is telling me it will take 5 hours.
Has anyone ever resolved his issue?

So as mentioned above I tried connecting to the router using a wire instead of wireless..
many sites work fine....but some do not
Example
works fine
Apple.com
gmail.com
does not work fine...the page does not load up and gets stuck in the very beginning....
www.CNN.com
http://www.sportsauthority.com/home/index.jsp
sportauthority has flash embedded on that page....CNN, I do not know...
could it have anything to do with Flash ?
Regards,

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Need some help.
I run Apple os/x latest version and have since yesterday begun to experience constant very slow download speeds.
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Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
SendBufferSize set to [131768]
running 10s outbound test (client to server) . . . . . 5.44Mb/s
running 10s inbound test (server to client) . . . . . . 1.94Mb/s
------ Client System Details ------
OS data&colon; Name = Mac OS X, Architecture = x86_64, Version = 10.8.2
Java data&colon; Vendor = Apple Inc., Version = 1.6.0_37
------ Web100 Detailed Analysis ------
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Anyone else having slow download speeds ?

i am having slow download speeds ever since the apple keynote... is this the new data center speeds?... is this what we should expect from now on?

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hope this helps finovotny....

Exceedingly slow download speeds on brand new mbp os lion

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