I went to a friends house and he had the 2011 Core i5 Macbook with Intel 3000M Graphics, and mine is the 2010 Model with the Core 2 Duo and the Geforce 320M. We could both open the exact same amount of heavy applications before seeing some lag. So how much better is the i5 MBP CPU than the Core 2 Duo in the previous generation, because it really doesn't seem so much better.