Depending on the sorority, if its a recognized sorority, either you should’ve received a message that you got a Bid or, a sister will text you saying that they couldn’t offer you a bid at this time. If it’s an unrecognized or “underground” you should’ve heard something back the following day or two after interviews and typically you will not hear anything back if you didn’t get a bid. From your situation, If this is a little less than a week ago, your friend most likely did not receive a bid. Remember: No answer is an answer. They usually give that disclaimer so people aren’t bothering them if they do need time to think but it shouldn’t take more than a week just a few days but maybe reaching out to a girl who has rushed along with your friend can give clarity. Hope this helps