I got a i6s about a week ago and was using 9.1... The performance was great, all animations were fast (home, folders, multitasking, icons, etc). Occasionally the status bar would disappear for a second or so and the search bar got misplaced once. Apart from that, it worked great. I'm using 9.2 now and... well, the phone is still fast but the folder animation seems slower. If I try to open a folder with more than 1 page it's noticeably slower than a folder with 3 or 4 apps in it. That wasn't the case with 9.1. It's kinda irritating cos 9.1 didn't behave like that. But apart from that, the phone is fast and the search bar and status bar work fine so far.