So.. I emailed both the Harvard RSEA and GSAS asking about decisions, RSEA never got back to me, and here's the GSAS reply:
Dear XXX,
Notification of admissions decisions is communicated by postal letter. We
will not email to you the decision on your application.
We cannot offer you a specific date when your department will notify
applicants of decisions, but all decision letters are mailed by March 15th.
Sincerely,
Harvard GSAS Admissions
Maybe there's some discrepancy between the RSEA and GSAS office cause apparently guys here did get email notifications...
Anyway, still waiting..