It isn't just that one. Have a couple of friends that have the same issue and there are a lot of complaints on Apple's community forums. My 4s bogs down every now and then which it didn't do on iOS 6. My iPad 2 isn't too bad, although you close the cover and it takes about 3 seconds before you hear the lock sound. Hopefully Apple will release an upgrade to improve performance on older devices.
10/11/13 at 12:11pm