I had an interesting conversation with my mom about that a couple of weeks ago.
She was under the impression that us kids grew up sloppy because she didn't make us do chores.
Our recollection (all three of us) is that whenever we tried to do something, she immediately took over because we were doing things in our imperfect kid way. Lesson = if it's not going to be absolutely perfect, don't even bother to try. As far as what happened when our dad was supervising and we didn't do something perfectly... well I don't even want to go into that.
I really struggle with being able to do things half-assed (i.e. the normal way that most people do them). Cleaning the bathroom one fixture at a time really helps me with that. It's a lot easier to devote an hour to getting the toilet spotless, or two hours for the shower and tub, than it is to find (or want to find!) an uninterrupted bloc of time to get a whole bathroom perfect.
Speed comes from what you put behind you. - Judi Ketteler