Yes, it is faster than a 8600GT. Most of the people complaining about the new MBP GPU don't know what they are talking about. They should spend some time on tomshardware or overclockers and look at benchmarks before posting false information.
A newbie has never spoken such beautiful truth.
Sorry you two, but this simply isn't true. The 8600M GT is still more powerful. Take a look at this other thread I posted.
No, your 320M is not more powerful than the older 8600M GT