I just tried Battlefield 2142 for the first time in an age, now that I've got Snow Leopard installed. It appears that the performance of the game has somewhat improved. I can now run the game with decent performance at the Medium preset and 1024 768 resolution, whereas before on Leopard my MacBook Pro was struggling desperately with everything set to Low. Judging from this improvement and the Dock performance improvement (that I described here), Apple appears to have updated the NVidia graphics drivers or something to similar effect. Has anyone else noticed this improvement in Snow Leopard?