Everything that went out the door used to have to live up to Steve Jobs' standards. I'd imagine those under him had a similar obsession, considering Scott Forestall talked about going over the iPhone UI with a jeweler's loupe.

These days it feels like various teams are responsible for their part and they are managing toward a delivery date. As long as they check the box that the feature is there... ship it. There is likely not anyone around to throw the product in a fish tank if it isn't up to par.