[sambe]

I'm sorry but this is simply untrue. Every time I have hardware 1-1.5 generations behind (which is not always, I've done it both ways) the OS upgrade makes it somewhere between noticeably slower and painfully slow. I've recently used an identical model side-by-side that was not upgraded and it is vastly snappier. this has nothing to do with waiting for x.0.1 or app updates. In this case we are talking about iOS 7 on 4S, I'm refusing the iOS 8 upgrade for obvious reasons. I've seen others have similar problems in previous iterations whilst my newer hardware was fine.

People are fond of overstating Apple problems and I'm grateful that the opportunity to upgrade exists at all. However it is a fact that it often destroys the performance so the ability to revert seems very reasonable. I also find the extent of the degradation puzzling.