Dear Todd,
At this point of my replying, there have been 27 other replies all, or most of which IMO, come from very accomplished golfers.
I am, and I feel many reviewing these informative blogs, by published statistics, have double digit handicaps, which from my own personal experience doesn't allow, or I have not yet been able to 'time' ANY body or arm move PRECISELY, during the explosive 0.250 to 0.300 second downswing.
Since most of the 'release' movements such as this result in varying DYNAMIC characteristics of the angles and angular rates of the wrists, the only fair way to test the ABILITY AND MUCH MORE IMPORTANTLY THE REPEATABILITY OF TIMING a move such as this for me was on the AMM 12 sensor system at the Titleist Performance Institute (TPI) in 2008. Even with a plus handicap professional teacher being tested, any deviation from his 'grooved' natural swing, in an attempt to VARY, in our case the TIMING of the wrists contribution to club head speed, resulted in MAJOR changes in ball flight characteristics, hitting onto the TPI range.
Sorry, I was not smart enough at the time to record the differences in wrist angle and wrist angular velocities for these different attempts, but IMO, since reviewing the work reported on this site regarding 'The Release', and comments since, it is CLEARLY a complicated, and much more interesting to me a MAJOR DYNAMIC event IMO, warranting more study.
Fortunately, Michael Jacobs now has an AMM 8 sensor system, and if requested by YOU, his close friends, could provide the "Wrist Link Interaction" results from golfers of elite, and average capabilities, documenting how they are able OVER 10 SWINGS (for statistically significant reasons) to 'TIME' REPEATABLY, this final downswing event.
My bet is that the dispersion in ball flight characteristics will be unacceptable without lengthy and difficult 'habit changing' commitments.
I base this on my understanding of the limits of human body 'dynamic control' during such a short time interval of the downswing, BUT I SURE WOULD LIKE TO SEE FOCUSED TEST RESULTS in 2012, WHICH I UNFORTUNATELY in 2008 didn't have the foresite to record.