In a perfect world I believe the following:
Leverage is created by body position and no body has an advantage to create it. No additional leverage is created by a taller bowler. The same amount of leverage can be created by all size bodies (height) providing the same body position.
A longer span would indeed be able to rotate (rev) the ball more than a shorter span because of the time diffence between the thumb and finger release. The wider the span, the longer the time delay between the thumb exit and the finger exit. This additional time could indeed be used to create additional rev rate and the ability to utilize differing releases easier.
A longer length arm would indeed be able to create more momentum and power in the down swing thereby allowing more torque to be applied to the ball. In addition, the added length of the swing associated with a longer arm could build additional speed.
In a practicle world however not everything is ideal.
With reference to BT, his bowling science is exceptional. He understands the nuances and has defined the timing required for body types. This principal seems foreign to many people. While I understand them in theroy they leave no room for talent and in MHO this is why his theories are subjective. For example, I am 5 11 and weight 240. I have short arms and longer than normal legs. He might say I should use a 3 1/2 step approach to be able to have perfect natural timing. While another bowler being 6 6" would have longer legs and longer arms then me.. he might suggest a 4 step approach to have natural timing. In science and body modeling this works out ... but in practical application, I might be able to be more consistant using a 5 step approach. Bill seems to have issues understanding this.
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