Crazy short interview

Hello, I just finished my interview, it was at 2:40pm, got called in at 2:38, and was done at 2:44; the interviewers were very nice, only asked 1 background question, and 4-5 situational questions; I was wondering if it’s normal for the interview to be so short? There were other guys who went before me and still hadn’t left by the time I was leaving, but I got along with the interviewers and I think I had solid answers, is this normal?