iOS 7.1 a noticeable speed improvement on iPhone 4

Lots of little fixes that will make life on an iPhone 4 better. In addition to all the items covered in the linked article, I also found Bluetooth syncing to be much more solid on our test phone. For example, with iOS 7.0.x, the music app in a Bluetooth connection stuttered frequently. With iOS 7.1, things are noticeably better.