It seems A7 devices are experiencing the lag issues with iOS 9.
I have an iPad Air (1st gen), and it lagged all over the show, downgraded back to 8.4.1
For those who don't know how to downgrade, go here
How to downgrade your iPhone or iPad from iOS 9 to iOS 8.4.1
I have an iPad Air (1st gen), and it lagged all over the show, downgraded back to 8.4.1
For those who don't know how to downgrade, go here
How to downgrade your iPhone or iPad from iOS 9 to iOS 8.4.1