This study has a lot of good information. I would imagine most average bowlers would not understand the details of the information provided. Even some of the proshops guys might not.
If anything, I think in confirms how the dual angle method works. Seeing the graphs of each type of ball as they change the pin distance, VAL angle and drilling angle gives you a better visual prospective of what happens as each variable changes.
The trick is understanding how all three work together on different types of balls for different types of bowlers.
