It says my g4 laptop (1.5ghz, 2gb ram, 5400rpm drive, 128mb video) should be able to run Call of Duty: United Offensive and many other games well.

CoDUO runs so poorly on it that even at 640x480 with extras set to the middle (not entirely stripped down) I only average 20fps. I had to drop it that much because when the action got heavy the slide show was so bad I couldn't move or aim effectively.

My hunch is that this is not Aspyr's fault, but nonetheless, this until very recently top of the line laptop cannot run CoDUO very well at all. Whereas I get 40fps at 1024x768 with most fluffy options on on my PC. It drops during heavy action some, but not to a slideshow state. Very playable.

I believe the problem lies in the low level areas of OS X and the appropriate device drivers.

OS X can't even play full screen avi's at a smooth rate. Heck, much of the time it can't even do that with QuickTime. So while OS X may be several years ahead in features, it's 8 years behind in performance.