A fun BBC game, H/T Dr. James Thompson.
My average reaction time appears to be a shade above 0.3 seconds with very little deviation (0.05 seconds at most). It was bizarre to see all my sheep lined up on the same line of grass. With a dozen attempts and some experimentation I was able to hit 0.26 seconds a few times by concentrating on the ambient noise rather than the visuals, but the spread was much bigger.
Give it a try. It’s fun.
Aeoli Pera 
Mean: 0.21
Range: 0.167-0.234
3 attempts, same basic results
That’s remarkably better than mine. Curious, eh?
You spent several years training to react quickly, but I can’t imagine that’s the sole factor at work here.