2010 13 MBP here, I got improvements all across the board. In SC2 I could run medium settings in Windows but in OSX it was unplayable when alot of things were going on(1-5fps) now I can play on medium with shadows disabled in the config files and never drop bellow 20. In Wow it almost doubled my performance in raids and dalaran. I went from dipping to the teens to over 30FPS!!