For UC Berkeley, I emailed the coordinator yesterday asking if all decisions were sent out and what my application status is, here is his reply (today, Feb 2):
Indeed, applications continue to be in progress. As the selection committee continues to review applications, we anticipate that selections should be finalized by or before the end of February.
Not sure if he is saying so that I don't email him again until the end of Feb! End of Feb I feel is a bit too late to notify considering that visitation weekends are a week or so after end of Feb. Does UC Berkeley do waitlists?