"Very good. Anything over 60 is amazingly smooth. 60 is what the Dreamcast runs at for games like Tony Hawk and that is really smooth. "
Actually, in a timedemo I've gotten as high as 80 FPS in Q3A in 32 bit color and there's still skips and stuff in certain maps. I notice a difference with anything under 70 FPS. 60 can still be smooth, but once you play higher than 70, you notice the difference with less than that.