I hate to be blunt here no one needs to use bittorrent to download distributions - I have never had problems in just downloading the distribution I want even on basic adsl lines that where in use by 5/6 other people. And you can just dl the net install (whch is tiny) and install over the wire which is how I did my baby hadoop HPCCC cluster I am afraid that people who claim that just becase you can dowload distributions via bitorrent are just despartaly trying to persade themselves that 99.9% of bit torrent is not pirated. you might want to read http://nevertrustahippy.blogspot.co.uk/2012/05/few-things-few-people-should-know-about.html