My application is in, and I mailed my Personal Expression last week
This is my top choice, so I'm excited to have it in a week early! I got a confirmation email stating: "You will receive an email from NYU Stern MBA Admissions within the coming weeks confirming the receipt of your application and providing you with a password to our secure Application Status Check Website. Please note that application receipts will not be emailed prior to the first application deadline."
I attended an admissions presentation earlier this week and they said that December 15th is the initial notification for Round 1, meaning you'll receive an invitation to interview, waitlist offer or denial of admission. They release these initial decisions as they make them instead of releasing them all on the same day. If you live in the US, you must come to Stern's campus to interview. Once you receive the invitation to interview, they don't provide a window; instead, you can arrange your interview for any date. You will be interviewed by an admissions officer who will review your application immediately before meeting. You will receive a final decision 2-3 weeks after interviewing.