I just bought one of the new sr mbp's, and i figured i'd see how it runs, so on 1440x900 with cranked visuals (AF on half though), i loaded up a character into Ironforge, and i was surprised that around the auction house area, where its usually very choppy, i was getting no lower than 40fps, but most of the time it stayed just above 60, and occasionally going up to even 80 and 90! However, i started a new blood elf, and in the blood elf starting zone, i was only getting around 25 - 40. I mean, i'm not complaining becuase thats a very playable frame rate, but i just found it odd that in the area i usually get the worst frame rate (Ironforge) i ended up getting the highest.
I would love it if they figured out this problem however, so it runs that much better!