I installed mavericks. On my already super snappy retina macbook pro the systems runs fine, without any difference I would say. If I set the hight resolution Launchpad still lags a tiny bit. So I think everything is just the same as before for me. I am now trying it on a 2007 MBP
There's no lag when opening the launchpad and navigating around the os. BUT.. the frame rate drops to 1-2 when resizing windows it's really bad.. I wonder why that is and why they did not address the issue..