You know something just occurred to me. Maybe some people don't know about the "show status in menu bar" option in the mobleme preferences. That makes it very easy to just reach up there, hit sync at any time. I'm just thinking maybe some people think they have to go into preferences to sync up. That would bother me too if I thought that was the case.
Aye...that is indeed the case. I've only recently turned it on as I dislike my menu bar being cluttered. I'd imagine that you're right and a lot of people are having to 'click' more than they should.