Have upgraded Lion to GM on MBP 15" 2.4 i5 (2010) and disappointingly haven't noticed much of an improvement in graphics. I have moved this installation around quite a lot including upgrading snow leopard to lion, then clean installing lion and migrating from time machine to see if that would make a difference, then doing a few more time machine installations when I messed things up. Symptoms include choppiness switching between panes on launchpad, opening folders is even worse and unhiding the dock when starting up / it hasn't been done for a while. Is there any hope that when I buy the final release when it comes out (yes, I am using the iMZDL GM) and clean install it will help the graphics performance? On Lion i briefly tried a clean install before migrating my stuff over from time machine and couldn't see any improvement.