This macbook is not over loaded.
All I use (although not with a game) is XCode, Chrome, and terminal.app
Chrome is minimal, nothing fancy as far as extensions.
WoW runs fine and even looks better than the nVidia 8800 GTX on my gaming PC.
After turning down all graphical options I see no difference in choppiness.
I am running a developer preview of Mountain Lion 10.8 (2)
(upgrading to developer preview 3 now)
1.6 GHz intel Core i5
4 GB 1333 MHz DDR3
Intel HD Graphics 3000 384 MB
OS X 10.8 (12A128p)
My gaming PC is over 6 years old and ran the beta fine.
This is a new decked out macbook air with SSD. Thunderbolt display. New intel architecture.
Is this a memory leak?