When I used to play quake 3 and trained for some tournaments I was able to have a steady 0.15 reaction time and go low as 0.13 in this kind of games, right now I've got a steady 0.175 and low of 0.155, FPS progamers will have exceptional timing reflexes, I recall the best player I've met did around 0.12 all the time, that's insane.