Deluge is the BEST ever!! windows or linux platform, deluge is the tool for torrent BUT you got to know how to set up port right, otherwise full throttle won't be engaged
a lot of people dun know about DELUGE and they kept bragging about other pathetic clients namely AZUREUS, UTORRENT.. just to name a few.. nothing comes close to DELUGE, period!
i've been using deluge for a year plus now and always at constant rate of 150++kbyte for 1mb line.. my best speed was 190kbyte.. try dat on other clients if u can..

p/s: streamyx sucks BIG time!!!