I'd just like to point out that on my machine (specs below) the linux version runs on average 600-900 fps on windows it reaches about 200-300 fps....
Which one do you think is more effective ?
Althon-X2 4400
1GB
geforce 8500
gentoo , opensuse10.3 - winexcremente XP
P.S all games that have a Linux version seem to run faster (and smoother) in Linux including Quake 4...