For comparison purposes, on a PC Athlon XP 2500 with a 128MB Radeon 9200 Quake 3 running Windows XP gives 27-28FPS at 1280x1024 with everything turned on high, and a Dual G4 PowerMac running OS X with the same graphics card gives 23-24 fps.
No idea where you got those figures. I quick glance around the net suggests it's more in the realm of 80-100 fps on an athlonxp 2500+ with a radeon9200 using 1280x1024. It's only when you beef up both fsaa and antriscopic filtering to at least 4x that the frame rate reduces to those sort of rates, but then its not an apples for apples comparison. I guess the type of radeon 9200 in use is a big influence too. The 64bit memory bus on the se editions are quite crippling.
