The examples he give shows mid torque gains with going with a tighter lsa but was that really even in question ?
But to me the gains aren't large enough to say it proves DV's formula, if anything it disproves it cause to me for the formula to be valid being a few degrees off of calculated lsa in either direction should have huge losses, I'd like to see engines that the formula predicts wider lsa like 114-116 + and run 108 lsa and less against them and see if there's loses or gains, would be a better tests.