There's some speculation that iOS 8.3 beta 2 is faster on older devices than iOS 8.1.3, based mostly on two videos that compare iPhone 4s and iPhone 5 performance using devices running both versions of the operating system.
If you're running iOS 8.3, have you seen speed improvements over iOS 8.1.3?
If you're running iOS 8.3, have you seen speed improvements over iOS 8.1.3?