most cable internet providers in the US have throttled p2p connections. it used to be that downloads were limited on the server (uploader) side, but there are now cheap internet services that will upload quickly, so internet connections started getting saturated quickly. because many houses share a single cable internet line, people started complaining of slow connections, which was attributed to p2p downloading, thus: p2p throttling.
i guess i should have asked this first: what kind of internet do you have?