I do a LOT of torrent trading and I read a report from one person that said his cable company restricts his bandwidth when he starts to download big files .
He said he'd start a torrent running at something like 200k/sec, then later it would be going at barely 10k/sec. He further said this wasn't the fault of any software, because if he exited his torrent software and ran a speed test it would come through as 10k/sec.
Has anyone else had this problem? If it helps I'm in the Sacramento CA area and planning on using Comcast cable internet.