If the magnet mix files download very slowly it's not a good sign. It can point to an ISP shaping bandwidth for p2p. Do you know your ISP's policy on p2p use? Have a look through the articles below, there are more around if you search on Google. Do any other people you know use the same ISP & get good download speeds with p2p? One of those articles suggests that they're only throttling from 12pm to 12am...do you get decent speeds in the morning & crappy speeds in the afternoon?

http://www.dslreports.com/forum/rema...1350~mode=flat
http://www.mobileworld.com.my/3gee/?p=55