For those on iOS 8, please hold on and not run the 8.0.1 patch that Apple just pushed. It has been reported that it is causing serious grief causing these issues:
iOS 8 is being adopted quite quickly on iPhone 5 – (about 20% now and as long as you have 1GB space for download and approximately 5GB space for install). As usual, the updates will come quickly to Apple devices but as of right now, iOS 7 is still the most used version. Will keep you guys posted after a month or so.