I see that the 9600 is a big improvement over the 8600 which is usually not the case. Looks like you will be fine with it, especially when I noticed that the display size is 15.4 inches where high resolutions don't matter as much.
However, CoD4 is not being run at maximum settings. The guy himself says its a mix of medium and high. No AA is being used on any of the games being bench marked, and from my point of view as a desktop user, that is unacceptable. x2 should be standard if not x4. Especially on lower resolutions where AA makes the biggest impact.
Again, for 780$, in a laptop, that is fantastic, but saying it can run these things at max settings is a bit of a stretch.
You will probably do great with this laptop, but in order to get results similar to that guy's benchmarks, you better have at least what he has.
The processor you'll want to up at least to the core 2 duo, I'd personally go with the P7350, but its a hefty jump.