So I have some info on UChicago. I'm a current undergrad there and I was talking with my BA thesis advisor (who is also my POI) yesterday and I mentioned the two early acceptances and asked about my application (I didn't get in, with such a small class it was near impossible that I'd get in without a MA, but he said he pushed for me to get accepted with very good funding to the MA program, so I'm not too upset about it)
He said that all the decisions have been made but no one officially knows and he was surprised that professors had already reached out. He made it sound like results were still incoming in general. Also, there were 13 people accepted to UChicago this year, down from 27. They decided to do smaller admit class, bigger waitlist. He predicts next year they'll accept at least 20 people.