In the UK I would get through about 40-50gig of p2p however even if I tried there was no way I'd get anywhere near 100gb. The connection to do that kinda stuff just wasn't there... well it was, it was just wasn't p2p friendly.
Nowadays 10-15gig purely because I don't want to shell out more than $50 on b/band... kinda unfortunately really given all the online tv that's going to become available with sky shortly.
just managed to creep over my monthly 15gig befor the end of the billing period (buggar) :( extra 10 bucks for 500mb because remainder of the extra 5gig block doesn't roll over (orcon)
2x PC's and proly a few per month that i work on doin updates and installs (and p2p of tv / movies because wats on 1 2 3 or prime is rubish) if i could afford sky + ADSL i'd be sweet but i cant so p2p rules
i'd love to see orcon stop including uploads as part of my montly allowance but that'll never happen