The game is now running on iPhone 5 and iPad 2 pretty well. It's at 60fps on iPhone, fluctuating between 45 and 60 on iPad. The resolution seems to be working pretty well for both too, though for some reason iPad 2 is displaying 2 rows of garbled pixels along the top...
Does anyone know if there's any way to check what device is being used at any given time? All I know is the "Is on mobile device" condition.