Interesting. Mind you, the HD2600 barely beats the 8600M GT in 3dmark, and ATI's drivers have never been the best, especially when it comes to OpenGL performance. The issue between them in power consumption & heat output, which is also an important one, but I feel confident enough to say that Intel would've put some pressure on Apple to stay away from a competitor [AMD/ATI] and shop somewhere else [nVidia].
And the AppleInsider specs, whilst unlikely to be 100% accurate, are not indicative of a "MacBook-esque" upgrade at all. The SR chipset, the fastest current mobile processors [and the differences between these and the older chips], support for more RAM, a significant GPU upgrade, and faster/larger hard-drives. For the same price. It's a big upgrade, and it brings the MBP back up to 'cutting edge' as far as laptop tech goes. Or close to it, at least.