I have ATT Uverse and I have a similar problem, whenever I hit bit torrents to hard let's say for a full night, I get capped. (I have a 3 mpbs, when capped goes to 300kpbs) The only time I called to complain they schedule a technician to take a look, but after a couple of hours it came back to normal. I haven't used torrents lately so can't be 100% and I only noticed twice. Fucking ATT!