Not having a commute, or basically doing anything hobby-related other than my job during the week, is pretty much the only way this is possible. On the weekends I don't work much at all, except maybe an hour or two in the evenings, if that. Except this past weekend, which was more of a crunch (as next weekend will be, too). All in all it balances out pretty well.
And yeah, makes sense on the topic reasoning, but it's still amusing. Someone else commented briefly in another thread, too.