Should be Epic
I figure this has been replied to enough. However, lemme give you some specs on SC2. It's a demanding game, and it runs better on dual core processors mainly because dual core processors have faster individual cores that are fewer in number, and SC2 only uses 2 cores. I am using a mid 2009 mbp low end 13" model. This is, as far as gaming standards in the new world go, a terrible thing. It's a wonderful computer, just not gaming worthy in the new age. Guess what? My specs are these:
Nvidia 9400M GPU (1280x800 standard screen)
Intel Core 2 Duo 2.26 Ghz
4gb 1067mhz DDR3 Memory
250GB 5,400 HDD
For an example of old games, I run UT2004 and Halo at full settings, max res, 8x AA with around 30-40FPS. Totally smooth.
Starcraft 2:
Ultra Textures
Ultra Graphics, minus shaders. This means high physics, portaits, effects, animations, reflections, and that sort of thing, all minus the lighting effects.
I get dips to as low as 7 FPS on 8v8 Custom games, however in beginning games, I soar to 70fps when I'm working my mineral line. My standard gameplay FPS in a 4v4 online, on OSX running SC2 with the above settings, is a wonderful 38.
Now, let's imagine. The 15" 2011 is more powerful, verified by three facts. Okay, it's 2 years later. Big advances from Apple. Second, it's the 15", which usually contains more powerful internals. Finally, you're looking at the higher end model (assuming you're shooting for the 6750M), and therefore, this should perform significantly higher. The 2010 MBP 15" ran SC2 at High settings with a steady FPS. I would not myself be surprised if the new, High end GPU and CPU's combined of the 2011 15" could run SC2 at High/Ultra settings with good FPS at max res.
These are games I know will run well on OSX with med-high settings and good FPS with the 2011 15"
- Dragon Age 2
- Dragon Age Origins
- CoD4, CoD MW2, CoD Black Ops
- Crysis (this is impressive, ASUS and Alienwares have trouble with these)
- SC2 (discussed)
And many more. A great gaming laptop, and well-built from Apple. Probably worth the money.