I ran the 10k at the Run to Feed the Hungry this morning. I didn't see Stember finish, but conditions were actually pretty nice. A bit of rain, but temperatures were around 50 degrees with no wind. Maybe not PR conditions, but the weather wouldn't have hindered him. That 5k course is dead flat too, so it's not like there are any hills to slow him down.
If he had come into the race with zero miles under his belt, then I might expect 19:30. But to actually train, and even do a few workouts, and still barely get under 20 minutes, that's pretty sad. I guess it goes to show how much you lose when you're not exercising.
I honestly thought he was sandbagging when he set the time at 18:00. I was thinking he made the standard intentionally easy so that the school would definitely get the money.