It's been more than a few years since I worked at Apple, but they were always unique in the tech space in that their retail division dwarfed headcount. If I recall correctly all of OS X Lion was produced by around 3,000 engineers (and probably less, since I think that count included iLife and iWork).

Aren’t they sort of unique in that they… have a retail division, as a real ongoing thing (I’m sure MS tried an MS store but I’ve never seen one).

Well, unique other than Amazon I guess.