Joe I can tell you all videos I watch it buffers like crap on my connection.
Doing a bit more testing, it appears that 5 megs is fine for some 1080p videos, and just a little under-powered for others. If you are in fact getting your full 7 megs consistently, I believe that every 1080p youtube video should stream without interruption, so if they are all buffering (even lower quality ones) something definitely doesn't sound right.
