I'v got a iPhone 5 but I also had an 4S upgraded with iOS6. And between some of the bugss of the new iOS and app haven't been rewritten to take advantage of the iPhone 5's bigger screen. I'd like to go back to an 4S with an older iOS and jail broken.
Yes, yes there are the well published problems with either the new iOS or iPhone 5.
Something I experienced recently on the iPhone 5, watching a YouTube video in landscape. And nothing happens when I hit the 'done' button. I have to rotate it back to portrait mode before the 'done' button will do anything.