As noted in the various reviews, people have mentioned the lagging with the new retina notebook. I'll be putting in my order soon enough and a little dismayed by it. What evidence do the reviews have to state it's a hardware problem? When in the same reviews, they state a suspected fix with Mountain Lion? Surely this is just an issue with retina and Lion compatibility rather than blaming the hardware i.e. graphics card. Could someone enlighten me with an explanation? Graphics really isn't my area.