I know usage varies due to several factors, but for those who returned/exchanged or made a genius bar appointment for their relatively new iphone 5's, I want to know... -What was the process? Do they do some sort of battery test? -How much usage warranted the visit? -What did they do? An exchange of a refurb/new? ( I heard that Apple will soon start to repair on the spot.) I'm still in my 30 day return period.