AnandTech's review mentions multiple times that the 2.0ghz processor gives a significant increase in visual performance. Does this mean it has a better iGPU? In games such as portal, will there be a difference in having a 2.0ghz processor (vs 1.8ghz)? The thing that caught my eye was that it's turbo boost 3.2ghz while the 1.8 goes to 2.8ghz. Is this really meaningful? Do most games only get bottlenecked by the Air's iGPU or does the processor actually help?