Yeah... I did some reaction-time tests on a BBC micro when I was about 15 years old. These days they "red-flag" sprinters who respond to the gun in less than 0.1s, because it's counted as jumping the gun - but I was able to *average* about 0.08s, with lots of 0.04-0.06s, and that included making a decision as to which hand to use to press a key in response to a square appearing on either the left or right side of the screen. If you were less than 95% accurate on 100 tests then the whole caboodle was discarded - it assumed you were guessing.