Wizardawn, they can do the whole thing in under a minute; a complete dungeon built for up to seven different systems.
However, I have to ask...has anyone ever run a completely random dungeon? By this I mean, run it with no tweaking "to accommodate my players". No, I mean play it as built with no changes? I suspect no one has, but I could be wrong.
Have you? If so, how did it work in actual play?
If you have not, would you ever consider doing so?