Here is some text out of the third edition which were omitted in later editions.
"This is usually a subconscious procedure and is indicated by the inability of the player to hit well with all Clubs from a square stance. It faces the same problem of Club length that requires the Aiming Point procedures to move the Aiming Point fore or aft...So the Open and Closed stances are employed to vary the ball location in relation to the body to compensate for Clubshaft lengths...The Flip release is the result of the fact that the Right Arm (Accumulator #1) will start to straighten, naturally and automatically, at any point in the Downstroke that the Left Arm begins to move away from the chest - which it always must, sooner or later. Regardless of where this occurs, the players habitual Pivot procedure will bring the Hands, quite dependably, into impact position at the same point relative to the body."
(Bold mine)
Hence the requirement for open/closed stances unless the player can manipulate roll very well such as your average Tour caliber player. When you see VJ and Phil loose their right hand (Phil left) from the club through impact, they are effectively allowing their well educated lead wrist to have full control over the shot, even though their habitual pivot took their hands to the wrong impact location for the selected club and they ran out of right arm.
Homer goes on to say "There is little attempt to discuss Components and Variations in connection with this procedure, elsewhere in the book, because the only real differences are (1) the fixed hand location for Impact, and (2) the variable Plane Line for different length of Club."
The Flip release can be fast or lazy, the point is it is pivot dependent procedure. The hands are controlled by the pivot and impact occurs when the hands reach a certain habitual point relative to the body for every club. So if you are pulling your short clubs and pushing your long clubs, its a tipoff that you are flip releasing.
__________________
Bagger
1-H "Because of questions of all kinds, reams of additional detail must be made available - but separately, and probably endlessly." Homer Kelly
what is the condition of the left wrist in a flip release?
The left wrist is flat through impact.
The flip release is probably the most commonly practiced release in the world. Its simply throwing the hands with the pivot. Any potential arm swing participation is overwhelmed by the shoulder throw against the #4 accumulator. There is no non-automatic version of this release. Because it is an Automatic swinging procedure (6-R-0) the hands do not manipulate the clubface at all. This release will "flip" the Clubface around and into the ball.
__________________
Bagger
1-H "Because of questions of all kinds, reams of additional detail must be made available - but separately, and probably endlessly." Homer Kelly
Another unique characteristic of the Flip Release is that it does not employ an aiming point.
All other Releases fall into the category of Hands Controlled Pivot procedures and utilize an aiming point.
For that reason, it is commonly associated with the Circle Delivery Path (10-23-E) of the hands and Shoulder Turn Throw (10-20-C). Release occurs when the pivot subsides and allows the left arm to begin overtaking the shoulder turn which is simply the release of Accumulator #4.
__________________
Bagger
1-H "Because of questions of all kinds, reams of additional detail must be made available - but separately, and probably endlessly." Homer Kelly