Doesn't surprise me, some of the best shots I know are in their fifties (my father included). I've taken a few tactical handgun classes myself (at TDSA) and I'm at a level you could say was 'pretty damn well above average'.
Damn, you need to see the video of my exit test there. I couldn't believe I shot so fast. 12 rounds, 2 on each target, 3 steel plates at 15 yards, 2-2-2 reload 2-2-2. Final score; 5.89 seconds. (IIRC... I know for a fact it was five-something.)