I just downloaded a 695MB ISO image @ 1176 K bytes per second.
Oh, did I mention I was downloading Superman Returns in HD to my Xbox at the same time?
Comcast's network is sickeningly fast. This is almost 6 times the performance I would get from my Sonic.net 3Mbs DSL (average speed, 1.6 Mbs) -- which I paid $25 more per month to have. And no, there's no lack of people on my block who have Comcast. I live in the middle of San Francisco.