Yes, those numbers seem somewhat faster, but the medians I got for the four courses I looked at were still 27:27, 29:02, 27:13, and 28:19. 25:00 is still better than median even among runners who participate in official events, so it still seems true that 25:00 is closer to "well conditioned athlete" than to "reasonably healthy adult". Remember, "well conditioned" doesn't mean an elite marathoner, and "athlete" doesn't mean a professional. If you're running 5km in under 25:00 you're well ahead of the vast majority of human beings.