This was in last year's thread:
"Current M1 - Congrats to everyone accepted! You'll hear more about an accepted students chat via email.
For reference, I interviewed in December and did not hear back on Feb 1st, so don't get worried if you're in the same boat.
When it comes to waitlists, etc here's what I will say. For the "normal waitlist" people (should be obvious, the email will say waitlist in the subject line), generally Einstein doesn't have much movement. Don't lose hope but generally speaking that's just the unfortunate reality.
However, there is the so-called HPWL - this will be vague and you'll get an email with something like "Rolling Admissions" in the subject line and they ask you to email someone from admissions indicating your interest. This is an extremely good sign and I believe roughly 1/3rd to 1/2 of the admitted class comes off this list, but you'll have to be patient and also nothing is guaranteed. Last year the A wave from this list wasn't until May."