I don't run much, did a few 5 and 10Ks in the past, but it's been years and I run an 8-min mile and a 28-min 5K. Based on what I've seen at races, it's a decent time. As a female, that would usually place me in the middle of the finishers' pack. Same when we used to run at Crossfit, I would be about average. I ran a 5K for track athletes once, and placed second from the bottom, but that's expected, because I haven't spent 5+ years running practically every day and I'm a competitive weightlifter hauling 30 lbs more muscle mass than most of them. I think 8-9 min mile is a perfectly fine time for a woman - can't really speak to guys.