Last year MET acceptances posted in February. I did see a rare MET applicant post their acceptance in March but they may just be a late post and not a late admit. GMP acceptances came in March last year. Some MET applicants have been admitted in the last 40 minutes so all decisions should be posted by now.
UCB website states:
Q: When will I hear back from UC Berkeley about the admissions decision?
A: Applicants who are admitted to the M.E.T. program will be notified in either February or March of the following year.