I'd tend to disagree with your assessment of iOS' performance on the iPad 2. I have an iPad Air and an iPad 2 and quite frankly the iPad 2 crashes less and runs

I'd tend to disagree with your assessment of iOS' performance on the iPad 2. I have an iPad Air and an iPad 2 and quite frankly the iPad 2 crashes less and runs more consistently on iOS 7, as opposed to my Air. It feels as though iOS 7 wasn't ready for the Air, but it has been improving with each update.