Went to El Progresso again this week, mostly because my friend likes one of the waitresses there. The agua fresca and the tacos were alright, but I think I'll wait until tamale season to return again.
The churros we picked up at La Tapatia on the way back downtown, on the other hand, were great. And the pan dulce made an excellent early breakfast the next day.
Still no more signs of the taco van at the College. Maybe it was a mirage.