I managed to get 0.02 once. You just have to click when you think it's going to change. Sometimes you get it right, but normally you just get a 1 second thingy. I got 0.02, 0.07 and 0.04 in a row, then I got a 2 1 second penalties. >_<
For these with more than 0.25 secs: try playing Touhou games for few hours, then take this test again. This can improve your reaction time by 0.05~0.1 second.
0.196 average. I did have about two beers so who knows what sort of influence that has. I prefer reaction games where you have to physically react though. I guess they're called reflex games instead of reaction games. In the end, a fast twitch is not half as important as a slightly less fast reflex. A goalkeeper that twitches his hands in the wrong direction 0.15s after he sees the ball being shot isn't as useful as the goalkeeper that takes 0.25s to move his hands in the perfect position
Play these games long enough and you'll pre-empt it often enough in one round to get a crazy average time. Anything under 0.10 seconds would be considered a false start in athletics.