@b0rk
Really nice blog, and yeah, confirmed, there's a stark difference between the mental model (I'm one of the "all of the above" folks) and the actual technical model.

Speaking of this, before git, I worked a lot with monotone, which has quite a lot of similarities to git... however, storage wasn't one of them. Monotone stored commits as diffs, so there were situations where they had to be replayed en masse. That could be quite a performance hit...