So I have a mid-2011 Macbook Air and every time it woke from sleep there'd be a 10-15 second delay between screen on until the cursor was usable (it was frozen during this time). Not a major issue but annoying nonetheless and seemed to be something a lot of Air users were dealing with. I'm happy to report this is no longer a concern. As soon as the screen lights up the cursor is usable. Yah for this! Now I have to see if it still has that annoying bluetooth/wifi interference thing going on.