I couldn't find much information about this. Does anyone have iOS 5 running on an iPhone 4? If so, how is it compared to the latest version of iOS 4? I don't want to upgrade my iPhone 4 to iOS 5 if it's going to make my phone slower (to force me to want to upgrade to the iPhone 4S). I've been around long enough to remember how painfully slow the iPhone 3G was on iOS 4 and I'm hoping to not have to go through with that whole situation again. By the way, I never bought the iPhone 3GS and I don't plan on getting the 4S. Does anyone with the iOS 5 GM wanna give their thoughts on how smooth/fast iOS 5 is on a plain ol' iPhone 4?