I found these on one of the other forums that I frequent and thought they were pretty neat. Try it and see just how fast you really are
With this one, you click "start," wait until the screen changes colors and then click "stop."
With this one, wait 'till the traffic-light changes and click. I like this one because it give you an average.
I tend to average in the .20-.23 second range, my best individual time was .14 sec.