All I can tell you is that a 1st gen 2.66GHz 4-core Mac Pro desktop gets a benchmark of 5500-5800 and this 2.66GHz i7 17" mbp gets a benchmark of 6200.
Definitely feel the HUGE difference from the previous gen mbp. I know I've said this a few times in other threads but FINALLY a TRUE desktop replacement notebook from Apple!
I absolutely LOVE the auto gpu switching. I dont have to log out and relaunch all my apps in the spaces anymore. I've been on campus (typing from there right now) for the last 3 hours and the battery life is still showing 7 hour and 36 minutes! I saw battery life go as high as 11 hours and 20 minutes. Its crazy how fast these new i7 mbps are while getting a battery life similar to ultraportable notebooks!