Multiple timers selected (Hasty, Friendly, Patient), how does game pick which one?

[Dwedit]

When multiple timer choices are selected (Hasty, Friendly, Patient, etc), how does it determine which timer setting to use once players are matched?

[Ingix]

I asked, and the answers seems to have changed over time. It started with the fastest setting shared by all players, but currently it is random from among the shared settings.