[MizunoJoe]

That is a very good observation.
Having a snap release does not guarantee that one will become a big hitter - it just maximizes mechanical advantage. There are other factors in play like hand speed and pivot speed - contrast Scott Verplank's swing to say Sergio Garcia's and Bobby Schaeffer's which have a more "whiplash" effect.

Exactly - Young Schaeffer had more hand speed, pivot speed, and suppleness than Verplank, and unreal lag - at 1:41 his hands are almost mid-body and the shaft is curved upwards, well above horizontal. This all gives a more dynamic look(whiplash) and more power. Scott simply doesn't have the physical equipment to do this, so he maximizes his clubhead speed by playing his hole card, the late release.

I've read that Bobby has snapped ultra-stiff XXX shafts!

An older, less dynamic Schaeffer