That's cool. Did not know.
It's starting to look more legit. The IP is an ACOM IP.
Also, it's really not that important of a decision from the school's POV for several reasons.
1. It's still pretty early in the cycle.
2. It's very early in the cycle for students to be committing to schools.
3. This person has not yet paid their deposit and presumably has not communicated to ACOM that they have turned down all other interview offers.
4. Like all other med schools, ACOM can replace 99% of the people it accepts. The 1% being superstar applicants.
However, I do agree that the timing of it does make it seem fake.
Edit: I'm not douching on this person, I'm just pointing out that this decision probably isn't that big of a deal to the school. The reasons why they made the decision are big, obviously, but the decision itself (rescinding a single offer in November) isn't hurting them at all.