[Weightshift]

http://sonicboomgolf.com/PowerGolfSpeedSwingVideos.php

This has Phil's swing, and a few others.

About the collision at impact, if you watch the videos that show closeups at impact, you can clearly see the direction of the club being altered. One of the benefits of sustaining the lag through impact is to try to offset the affects of the impact collision. If impact with the ball is capable of caving in or cracking a clubface, or snapping off the clubhead at the hosel, then surely the force at impact is sufficient enough to alter the path of the club through impact, especially since it is essentially a glancing blow (given that the club has loft).

Thanks for the link but I see no such evidence here: http://sonicboomgolf.com/PhilMickels...eSwingKeys.php
No evidence here of what you speak.

Breakdown of the materials of the clubhead is more likely to be due to faulty components of same. Do you remember when John Daly first appeared on the scene and talked of the number of clubheads that he had broken, and the move to Kelvar if memory serves me correctly. None of that today. Maybe someone here with math/physics can calculate the effective momentum of the clubhead at impact and compare it to the mass of the golfball (it has no momentum, being stationary) and show just how wrong your claim is.