Dude, I get 15 to 20 FPS more in Linux than in Win XP. and plusin Linux I have everything set to highest setting at 1024x768 and in Win XP I have only up to High at 1024x768. If I set everything to highest in winxp the freame rate goes down to 24FPS.
My system is Athlon XP 2100, 512MB PC 2700, geForce 4 ti 4600.
Plus I play with AA set to 2 x in both Linux and Win XP