I believe that I can force-join someone after three days with standard ladder settings, and then the autoboot would come into affect three days after that. Can anyone confirm that?

Is there any way to see how many days it's been since a game was created, to determine how long until I could force join them?

Game setting tells the created time and date.

autoboot is the same as direct boot on ladder games so you wont be able to force join anyone.

So after three days from the creation of the game, he gets autobooted? I think it's been about two days, but he's been inactive for almost 5.

3 days after creation he gets auto-force joined
and like sharpe says Settings shows creation time

Yeah, he got force joined yesterday, so I guess I wait three days for him to get booted now.