We need to define terminology here. "Staging" is pulling the trigger just to the point of the break, then stopping to create a sort of single action effect when firing double action. The actions of Colts and Rugers are more conducive to this unfortunate practice. The S&W action is simply not conducive to this sort of shooting.
The preferable way with the S&W action (really, the others as well) is is to pull smoothly completely through the double action stroke without slowing, stopping, hesitating or otherwise "staging" the shot in any manner.
The method taught by most of the "big names" in defense shooting is the method taught by Jeff Cooper (yes, he taught revolvers as well). That method is that the double action stroke begins as the weapon is brought up to align the sights, and the stroke finishes as the sights are aligned, and the shot is made when the weapon reaches the top of the presentation stroke which is when the sights are aligned. So, three things occur at once: (1) the weapon reaches the point in its presentation where the (2) sights are aligned, and (3) the hammer falls. This takes much practice, and it is very frustrating because timing is everything. It is suggested that it be perfected in slow motion. Speed comes eventually. This is best practiced with dry fire, and it has the advantage of simultaneously smoothing the action and allowing the shooter to learn the trigger!
I forgot to mention that the current S&W revolver manual has a stern warning against the practice of staging because of the danger of pulling just a bit too far and discharging the weapon when you intended to stop the stroke just before discharge.
EDIT: It sounds like what has been described to you in Post 12 is the non-staging method where the process of aligning the sights occurs simultaneously as the weapon is brought up and the trigger stroke is in process, so that all three things happen at once with one long, continuous stroke of the trigger in double action mode without any staging.