Funny, my impression was that it is rather Microsoft that also takes care of the little things, whereas Apple seems to be prone to skipping the little things because they might appear too ugly. It's little things like having the right menu options at the right place, "Open Command Line Here", stuff like that - have forgotten the details because I haven't used either OS X or Windows in a while. But Windows has usability research groups. I am not sure if Apple even has those, or if they just rely on their fancy designers.