[alex_chung]

In those pages, Bobby discusses how "game improvement" club designs can hinder players from developing a more dynamic swing.

The premise is that a lower/rearward clubhead center of gravity plus clubface offset help produce higher shots but due to the nature of their design, conditions players from learning to hit down enough.

I am just on page 162 of the Impact Zone so haven't gotten that far yet
Good book though.
Alex