So the one thing that really bothered me with old generation of MBPr is lagging. It was very annoying to see 20fps animations all over the place. (also I don't care about games). So, a quick question to owners of the latest retina: do you see any lags? Do you think MBPr is ready? I guess that discrete nvidia GPU will also have much better avg FPS count. Any owners of MBPr with iris pro integrated GPU here?