I've never understood why anyone would update any OS at the first opportunity. It usually means you get to be a beta tester.
Two questions related, if anyone knows:
a) The release of the 5 makes me think it might be time to get one of the $99 4S's that are now available - but will it come pre-installed with IOS 6?
b) Is the iPhone 5 running IOS6 reliably and untetheredly jailbreakable?