I think the hope isn't unwarranted. The releases definitely do come in waves, firstly. I happen to know that Penn and Princeton won't be releasing until closer to the middle of the month (so why not also Harvard, right?), and the results page shows two Harvard admits - one who was unofficially notified (congrats!) and another that was probably a troll post on the 31st. Don't give up! And in any case, we'll know soon.
I don't have any insight to UChicago, sorry, I didn't apply there.