You could do a test by downlding a magnet link from here to see what speeds you get http://www.magnetmix.com/video.shtml
Since that is a site, you should be able to get very high speeds. If you get abysmal speeds, then I'd be suspicious of your ISP. Who is your ISP?
They're shaping against bittorrents so ... there's a chance they might be anti-any type of p2p program, as soon as they detect either the high bandwidth use or they use a program to detect FW.