invitation sites are generally faster than public torrent sites.
For instance. Mininova has alot of the stuff that I wan't but due to hit-and-runners I'm not able to get it because there's no one seeding the damn thing. On a site like Oink, you have a better selection of music than the inventory on public torrents (on pub torrents they can throw out anything but on Oink the upload has to follow specific guidelines, like no transcodes) and most oink torrents will max out your connection when downloading.
And if you really want quality shit get newsgroups but you have to pay.

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