to me everything is running real smooth but the problem i just started running into is that of my phone is starting to run real hot again, i never had it run hot with iOS 6, it ran warm but not hot and its running hot still and i have the GM release and did a clean install of it, set the phone up as brand new, I'm running an iPhone 5
I had this happen today on my drive home using Waze...noticed the heat when I got a call. Then I noticed the battery percentage had dropped significantly. Turned off Waze and do a hard restart and issue stopped.
I think third party apps simply need to be updated for most of the issues I have experienced.