The quality of macs (perhaps it's all computers but it's really obvious with macintosh, as they used to have a much higher standard) has really been going down. I know a lot of people who have had problems with the mini's, and as far as gamers go, I think that might be most people I know who game bought a PC for gaming
That has to do partially with limited releases on macintosh platform, and partially to do with (mac users hate it when I say this) poorer hardware.