"games last 30-45 minutes"

i'd say 20-35 is more accurate. i haven't seen any 15 minute games, and it's intended to be on average, so 15 would have to be an outlier.

You still want to budget 30-45 minutes of time before starting a game, because they can certainly go that long.

The point is putting the time for the game. Sure games may last 15-25 minutes now on average but if you don't put at least 45 minutes of time away for a game. You shouldn't play that match. Its more meant to give you a warning on how long it can last than it truly last.

Basically stop the idiots that join a match then leave during it since they joined when they only had 20 minutes to play but the game went on for 30.