I have a 2G Touch and still have iOS 3.1.3 on it. I never upgraded to 4.xx because at the time people were complaining that the newer OS was slower. My 10 year old son is now using it and wants to run the latest games. He uses it mostly for games, music, and TextPlus. If I upgrade the OS to run newer games will the Touch run slower overall? Also will he be able to run most of the newer games like The Impossible Test on 4.2.2? TIA