Try an experiment with downloading a magnet link:
http://www.magnetmix.com/video.shtml
Tell us what speeds you get. If you get poor speeds then it tends to suggest ISP bandwidth shaping against p2p programs. (they rarely tell you they do this.)
If you get good speeds, then the problem may be the sources. eg: Shareza (RAZA) are reknown as slow to download from. Despite they have a large no. of videos. This is because most of them use more than one p2p network at the one time.
But if you feel this is not the case, then please answer questions from here
http://www.gnutellaforums.com/showpo...91&postcount=2