So there's not really any excuse for it being anything less than perfect.
That it isn't is pretty obvious and absolutely unacceptable for a company that professes to value user experience above all (except the bottom line, obviously).
The list of known problems is enlightening: ineffective lock screen allowing your photos and dialler to be accessed by anybody who gets their hands on your iPhone; dreadfully reduced battery life, audio glitches with Siri and turn by turn navigation; and of course the ongoing traffic accident that is Apple Maps.
I'm seeing some additional problems which may be unique to my phone, but certainly impact the user experience: dropped calls and poor call quality.
It's a long list for a small phone. And as a result I'm holding off upgrading my iPad Mini for fear of similar issues.
So whilst Android OEMs are inconsistent about pushing out new versions to their phones - often because of the volume of handsets produced - Apple have managed to miss an open goal with both iOS 6 and 7 updates.