Just ran some browse benchmarks.
Safari, Firefox, and Chrome. First on the integrated 9400m and then with the 9600m GT on Snow Leopard 10.6.1 (yes, there is already an update). The only one that really got a boost was Safari, I'm not sure if the 64 bit version of Safari vs 32 bit versions of Firefox and Chrome had anything to do with it.
I did notice that Firefox made the Mac run hotter when benchmarking than wither of the other two browsers. In fact, Firefox with the 9600m GT turned on ran about as hot as Windows 7 does at idle. It has to be a driver issue as to why 7 runs so hot on the MacBook Pro. I'm still upset about it.
Here are the screen caps for the 2 tests.
