Most places choose long lines, but Apple seems like the sort of company to choose to have people some people idle most of the time rather than have long lines some of the time.
My general point is, I can imagine how a seasoned retail pro might tour a bunch of Apple stores and come to the conclusion that they are haphazardly and wastefully staffed.
I also buy any argument for that conclusion being wrong! I'm not a retail guy. But do note that, like many other people who will chime in on this thread, while the Apple retail experience isn't bad per se (it's much better than shopping at Best Buy), it can in reality be very annoying. They have room to improve.
Every Apple store I've ever been to (Silicon Valley, Toronto, Ottawa) has been crowded, new product release or not. Yet, I've never had to wait more than 5 minutes to talk to someone (not including waiting in line for a new iPhone model).
Not having to wait long at an Apple store is part of a good retail experience - it's another way to strengthen our association of the Apple brand with quality (in line with their use of materials in their products, as well as their attention to packaging).
I guess that's why they introduced the "buy online and just take it and leave" model, so you don't have to deal with anyone, but it doesn't work for stuff in the back room.
[1] http://itunes.apple.com/us/app/apple-store/id375380948?mt=8
Oh, the thing I bought wasn't up front anywhere, but buried way in the back behind a door.
I have only had one good experience at the apple store which was in the valley fair mall in San jose. The SF store has always been fairly bad.
In one of them I managed to get good service even when the store was crowded (like Florida Mall crowded between xmas and new year). You use the iPad in the tables to join a queue, it may take some time, still it works.
(2) The Apple stores I've been to have been comically overstaffed, with badges & blue shirts sometimes outnumbering customers, despite large numbers of those customers. Many of those retail staff don't appear to be doing anything. Perhaps they need more people at the "Genius Bar" and fewer on the floor.