So I caved and emailed the department at Harvard asking when we should expect decisions. This is what I got back:
We expect the Graduate School of Arts and Sciences to notify applicants of all Admissions decisions within the next few weeks. You should hear from them by mid-March.
I'm not really sure what to make of that. I'd like to think that this means that they haven't sent out acceptances yet, but I also imagine that accepted students would be contacted by the department and not GSAS. So it might just mean that my rejection is in the mail.
Still keeping my fingers crossed for everyone though!