Official torrent downloads:
http://www.ubuntu.com/desktop/get-ubuntu/alternative-downloa...
I'm not leeching I get lots of connections it just goes slow as molasses. Guess I'm doing it wrong but just in case others are getting slow downloads via torrent I'd really consider a direct download.
Edit: Just tried latest Kubuntu torrent and let it settle for five mins, so far I'm on 1day 20hours remaining after bringing it down from 4days by adding a web seed. o_O . It is working, downloading and uploading, picking up and dropping peers etc..