Answer: Longer than 30 minutes. But we're past that. No sign of anything like the in-season improvement that would give hope Riley could ever succeed to the degree we want, imo.
I'm not asking Riley to be fired this weekend. That's up to Moos. But Moos's only consideration in timing should be what is required to maximize the transition to a new coach, and if that means firing now to get someone who could make a play for recruits in the early signing period, so be it.
Thank you Mike Riley and coaches for your efforts.