Speed up the feel of Windows with the double-click speed setting
According to Chen, a number of user interface timers in Windows key off of the double-click speed registry setting.
The default double-click speed in Windows is 500ms , or exactly 1/2 of a second. Try dropping that down to 250ms -- about three-quarters of the way towards Fast -- and watch the rest of Windows feel just a bit snappier, since a number of other Windows user interface timings use that setting as a reference. Cool!