How many turns does your typical game last?

Just curious. I seldom have a game last less than 20 years (240 turns), but I can't remember having one last more than 40 years yet. Oddly enough, my tiny maps tend to be on the low end of this spectrum, but not lower than the low end of my huge maps. I'd expect the first, but not the second.

Anyway, now that the Metaverse is penalizing scores for long games, I'm curious as to what constitutes a long game.