Can't say much about battery life at this point but performance isn't much better than b5.
Mini 2 here. Switcher 15-20fps, spotlight still lags, but no control center lag(there's not been much cc lag on iPads to be fair).
Custom keyboards still don't animate like iOS 9 beta5(not 9.1)
My first public iOS release on the iPad since 8.4, and sheer disappointment throughout.
iOS 9 was fantastic on the 5s though.. Will have to update to 9.1.
Did not fix unread mail false count as promised.
On my iPad empty junk and deleted email folders still read over 200 in each and climbing each time I delete more.
On my iPhone 6 it did take the count back to zero but now it too has started climbing with each batch of emails deleted.
Folders all show empty, but count still climbs.
My 6+seems a bit faster for certain tasks but an update also does a reboot and the phones always seem better after a fresh reboot. Normally I go for days without rebooting so who knows.
I'm hoping the phone (6+) may just be re-indexing everything after each update so the immediate lag might eventually go away. Launching apps and working in apps seems smoother. Spotlight and other os overlays are laggy still. App switching is about the same as before it seems.