yes, quality over quantity. The wrist cock is slight so Lag must be much more then just that. That would be a form of accumulator lag.
Lag means to follow.
The Clubhead follows the hands - that is clubhead lag.
The hands follow the body- that is pivot lag.
You load lag to the top and unload or release it in the downward stroke.
I love this: 6-C-0 "...at every point in the stroke from feet to clubhead. Every Lagging Componet places a Drag on its preceding Component...." =D>
Leadbetter doesn't teach this good stuff.
When instructors say that Sergio has great Lag, they know only a small part of it. It is more then wrist cock angle.