No one ever claimed a game would be CPU bottlenecked. Just like you admitted, it makes can make a difference of up to 10 FPS. But for mobile cards 10 FPS can mean quite a bit...
I hope you are right but judging from AMD and pretty much any technological company's history, stuff like a drive rewrite doesn't provide the kind of performance boosts you are looking for.
If you are right, and llano could make a 6750m into a GTX 460m (which is what a 30-40% boost is) then this would be a technological breakthrough in mobile computing. And I just don't see it...if AMD really had that in Llano there's no way they would sell it (the 6755g2) for what they are selling it for. You know companies - they want to charge as much $ as they can.
Here's my chart:
AMD + APU for those who are students, on tight budget or for average Joe who wants a good all around system.
Intel + IGP for those who are students, on tight budget and still want to front like they have a rich mans laptop.
More people use their CPU's to the fullest than all the shaders in their GPU's to the fullest, so Intel + IGP combo would be good for the mainstream majority who'll never play a game more demanding than The Sims while their computer will be faster at everything else they do.