Does this prove David Vizard's 128 lsa formula ?

273,
DV gives the example of a 496 that has the LSA too wide by 1* & it will lose 10-15 ft/lbs. That would be a 2* change in a 720* cycle. Sounds about right to me. He also says that if the LSA is changed from optimal, the loss will be less if the LSA was tighter v wider....or words to that affect.