I have the iPhone 5 and just recently upgraded to iOS 7. Don't ask me why I randomly did, because I don't know either. It's nice and all, I guess, but I've noticed there is a big delay from when my phone is locked and I hit the home delay to when the screen that says "Swipe to unlock" appears. It's an almost 2 second delay, so it's very obvious and very annoying. Has this happened to anyone else and does anyone know a way to fix it?