It seems to be up on my iP4 over iOS5's usage. Under iOS5, my usage was about 20% daily and under iOS6, it's 30% on a normal usage day (when I'm working, I don't use the iPhone nearly at all - I'm not a power user by any stretch of the imagination). The one app that really seems to suck battery life is the FB app. I've begun shutting down background apps whenever I think about it, too. Anyone else notice a difference in battery usage?