Inspired by this GQ thread: Human reflex and reaction times
I used the ReflexTester. After practicing for a while, I got down to an average of 0.27 or 0.28 seconds. My best time was 0.16, but that may have been a fluke, since that was the only time I got below 0.20.
At school we did a test where one person held a ruler between your fingers. when they let go you had to catch the ruler. I caught the ruler quicker than everyone else in the class, almost every time. (the speed is ‘recorded’ by the fact that the quicker you catch the ruler, the less ruler will be underneath your fingers)
I was also a good goalkeeper, until I started to get rubbish at it, then I started to be a good defender (soccer) also requiring quick reflexes.
So in answer to your question - fast enough.
I am off to use the reflex tester - which will probably prove that reflexes is one of the things I’ve lost with age.
First attempt - 0.181. I guess I still have those reflexes. unless it was a fluke, like yours.
Heh, I tried it 10 times and got .22 8 times, .16 once.
I also got a bunch of “Cheater! You clicked too early!” so I didn’t count them. 
Fucking hell. I’ve done it about 10 times now and I get 1.6 every time. I hope that is good. someone will probably come along and get 0.1
Sorry (embarrased) I meant 0.16 not 1.6
anyway, it said ‘nice!’ so it must be good.
My best after about 15 goes is 0.15 with only one ‘cheater’
I guess 0.16 will be the average between young dopers. I get it almost every time. with the odd 0.14 or a few 4s and 5s which say ‘have you been drinking?’
funny thing is - if I was drinking, my reactions would probably be faster.
I humbly apologise for the number of replies to this. I am just quite excited that I still have good reflexes when I am fat, and eat junk food all the time.
Tried 20 times. Through out the highs and lows.
14 times it was .22
Threw.
Well, I had had 4 beers since noon.
If you can give a cite for that, I’ll eat your shorts.
I always thought I was clumsy as hell, but had reasonably fast reflexes (which kept me from falling on my face every ten minutes as I tripped over things). I guess my reflexes haven’t slowed down that much at 46 years old.
The majority of my hits were .17, with the slowest being .22, and with one exception, the fastest were all .15.
The exception was .05. I accidentally clicked to soon, and the color changed after I started to click, but before I finished. The comment said “You can’t do much better than that”. But it was just a fluke.
Ugly
I got a .11 a couple of times (“better that clint eastwood”), I also have a headache from focussing on the screen.(ouch)
0.161 is my best.
I tried doing it with my eyes closed, 0.22. 
.21 on my first try, .16 second, .03 third.
Then I started jumping the gun, trying to beat that last one.
Over another dozen tries, I placed from .1 to .15.
I am drunk now. I am getting 0.22 almost every time. except for a few 0.16s and one 0.05!
so I guess I was wrong. . however, I don’t think the 0.16 and 0.05s were flukes, as I have only tried about 8 times.
I’m getting .16 consistantly, occaisonaly getting a .22 (are these the only numbers it knows how to give? Sheesh.) I pressed to early once and got a .05, heh.
I’m getting 0.196 or thereabouts intermixed with slower 0.214’s.
My browser doesn’t play nicely–the page doesn’t turn red for me and I’m reacting to a change in the way the text appears on the screen.
I’m 43 so the 0.196 is probably in real life as good as I’m gonna get 
My fastest is .16 and my mode is .22. I wonder if I can take off .03-.04 for using an LCD monitor :D.
I posted a site like this not too long ago. Back then I sucked, but tonight I got a .161 right out of the gate. Thinking it was a fluke, I kept on trying. In order, I got a 21, 16, 16, 17.
I think I’ll stop while I’m ahead.