Evidence-Comcast interfering with BitTorrent Uploads
Or search Google for these terms: comcast bittorrent
From TorrentFreak: It might be that not every Comcast customer is equally affected, but a significant percentage is. Not only the 10+ users we talked to before we first reported this issue, but also hundreds of additional commenters here on TorrentFreak, and elsewhere. Some users even captured the throttling in progress on video (this download), and anyone has to agree that this does look very suspicious.
Alternate Video Source is rapidshare.com/files/40696804/bad.avi