Here's an update on my application timeline for anyone who comes across my MIT PhDCEP post in the future:
I submitted my application through the Chemical Engineering GradApply portal in the fall.
I was contacted in February, to inform me that my application was under review at MIT Sloan.
I interviewed with a Sloan admissions officer a few weeks later.
I was admitted within a week of the interview!
@ChemEBear (in reference to your signature) I don't think MIT sends out all acceptances on one day in January. At least they haven't in previous year results.
As far as I can tell from results, it looks like Princeton, MIT, and Georgia Tech are yet to release a large batch of acceptances (sorry if I missed any, these are the first to come to mind). Has anyone heard of acceptances from them within the last few days?