said by Dawson46:
We have Extreme 105 and Comcasts DNS has been a major issue with us so we did the Google DNS.
With those speeds provisioned, you may want to reconsider using GoogleDNS (or any other DNS provider for that matter). I tripped over the fact that using alternate DNS providers results in you being connected to the wrong CDN (Content Distribution Networks). This can result in your downloads being much slower that expected.
When I was using Google or OpenDNS, my best download speeds were about 1MB / sec. Switched back to Comcast, was getting as high as 6MB / sec. See this article for a full explanation -
(There are many other articles out there - but this one seems to explain it well)