I think that is partially true more 20yrs ago than now. Hand times were all they used in HS. Now, there's a mix of both. I think now many post their fastest time vs the most legitimate then you go to College when everything is e-timed and the times drop. Like Deanthony Thomas ran 20.6 at City meet but 21.64 in the State Finals. Once he got to college he ran the 200m at 21.26 in the Pac Championships. So he got faster from the State Title time, not that City meet time.