I know this sounds weird, but I feel that this is at least somewhat true. Since the public beta first came out, I have only used iOS 9 on A7 and above devices (iPad mini 2 and iPhone 6), obviously, the devices that have Metal support. iOS 9, as we all know, was touted as an at least somewhat performance-based release. And we all also know that it has not lived up to that. Well, for me at least. Now, yesterday, I updated a family member's iPhone 5 to iOS 9 (I advised them that it was kinda sluggish but they were quite interested in the update) and much to my surprise, it works better than my iPhone 6 in some areas. Control Center is pretty much a full 60FPS just like before, even when being used over the App Switcher! On my iPhone 6, this will all be 30-50FPS and it feels generally less pleasant. I did a fresh DFU restore for my iPhone 6, and theirs was a regular iTunes install. Old backup that's been being used since iOS 6. Maybe the use of Metal just hasn't been fully... Optimized yet? Maybe it has to do with the 64-bit architecture of A7 chips and RAM constraints? I don't really know what I'm talking about, but these are just my best guesses. Anyone have a similar experience? Thoughts?