He is probably going off previous experience with Apple and Graphics Drivers, my experience tells me that Windows works much better with Graphics Cards, and i believe Sandy Bridge will be no different
Absolutely, there is no defined "proof" until Apple is dumb enough to release one. I don't think it's going to happen.
However, if someone does want "proof" that the current Intel IGP sucks badly too, we just need someone to determine how to disable the Nvidia GPU on their MBP 15" with both Intel IGP and Nvidia GPU. Right now, people can disable the Intel IGP but the reverse is not true.
However, as you said, previous experience yes... and the fact that Windows is 3X more capable when it comes to OpenGL graphics. And the fact that we have all dealt with MBA's with Intel's IGP and it's and always has been CRAP.
I am not saying Intel isn't improving, but it's nowhere near where it needs to be for Apple to use it with OS X and have even moderate success. It just isn't what we need with OS X computers right now.
Hell, when Apple can improve on its part, and when Intel catches up with ALL of the Nvidia GPU/chipset specs, it would be time for Apple to go with it. It represents a huge cost savings as Apple has to buy the IGP with every Core i-series CPU. If they didn't have the discrete GPU cost in addition, that would be a good thing for shareholders.
I really like the name of the Apple Media Event next Wednesday. Cannot get any better than Back to the Mac. I have been saying the Mac has been left alone with no real improvement for way too long.
I still think that we will get an MBA update, along with iLife 11, iWork 11, and looks like a preview of OS X Lion as well. I do believe it's very possible the MB and MBP will get updated too. All 13" Macs need an update. Whatever Apple uses in the MBA it will use in the 13" MB/MBP also. So why not at the same time?
I was certain that Apple would introduce a smaller iPad before Christmas, but they cannot do it at this event. Maybe a quiet press release? Not like there would be features they couldn't just show on a commercial and sell like 3b per month especially right before the holiday season.