How do you know it isn't netflix that is the slow one here? Sometimes I have to remind myself that it's Reddit that has the slow servers, not my connection. Try downloading a large file from a private Linode VPS and see what your speeds look like. At least for me, the speeds match very closely to the advertised speed.
Plus, one of the easier experiments is to swap in Google's DNS servers. Then the AppleTV is snappy for a few days. After awhile, slow-loading thumbs again. Swap back in the 2wire DNS, and snappy again.
I'm not sure the transfer speed to my Linode VPS really proves much either. It could be that video traffic like iTunes and Netflex are the big QoS targets, especially since they directly compete with the other half of the UVerse services.
