I went to the apple store today to make my mind up between the MBA 13' and the rMBP. While comparing them, I noticed that the rMBP has a little screen/display "lag" when going between the main screen and the dashboard and when going into mission control while the MBA. Was seamless. So I was wondering if that was a software issue that is likely to be fix or some other issue. Also I will be using boot camp for windows with which ever Mac I choose and the sales rep I was talking with said that when you partition the computer the entire systems slows down to 1/2 speed, meaning that the OSX could only use half the processing power and the windows side had the other 1/2 power. Is this true or was I talking to a misinformed rep? Thanks in advance.