What Should I Do??

I had my interview on January 27th. During the group interview and my one-on-one interview they said they would be emailing their decision a couple days after the interview. They stressed that they pride themselves on a quick decision turnaround as to not keep applicants waiting long to hear if they got in or not. They said the faculty board would be meeting the next two days after the interview to make a decision and then they would email acceptances/denials. It has now been 4 days since the interview and I haven’t heard anything. I normally wouldn’t consider emailing to ask at all but since they made clear statements on when to expect to hear from them, I’m thinking of doing so. How long should I wait until I reach out asking about a decision? Or should I not reach out at all no matter how long the wait?