I downgraded the other day. My iPhone 4 did suffer a bit in terms of speed and fluidity. In reality, iOS 6 wasn't that important to me to stay. Yes we have facebook integration and can tweet or update status from notification center, a couple UI enhancements here and there, new app store, passbook (which really doesn't work now because it's in beta) and other little things but it simply wasn't that... great to make me stick it out and keep on updating. I'm not saying the update is stupid, but nothing really sticks out to me. I will just update in the fall like everyone else. People who say they're not updating are senseless.