Looking through the tracker log I've noticed that a lot of people are using Azureus.
Well after downloading, installing and testing it I realized that any torrent I was downloading was getting 4 or 5 kb/s max. When I opened the same torrent in the official bittorrent client speeds jumped to a more respectable 20 kb/s.
At this poin I'm going to recommend that anyone using Azureus to just download the offical bittorrent client from the site. (google it, i'm too lazy to post it here)