Torrenting on TOR is an abuse of the service.

Also it will be very very slow.

TOR was designed to allow people to access websites that would otherwise be blocked for them, not so much for protecting your privacy.

Some good talks (well these are the pdf slideshows) on TOR:
* https://www.defcon.org/images/defcon...ledine-tor.pdf (quickview)
* https://www.defcon.org/images/defcon...acking_tor.pdf (quickview)