Heavier and most of all Bigger....plus the diesels at the time was Cats... Big Cats.
Buzzis IVECO series springs to mind and some other tin cats I´ve witnessed personally in the med (50ft 4 engine Cougar ,see below ) so seems Don Aronow was right on the money.
He liked heavier boats in the rough and personally I can attest he was right.
Apaches are awesome boats whether theyre light or heavy. Could you make one of the lighter ones faster in some conditions? (like some of the new offshore races) offcourse. But all of the ones that won in the kinds of conditions that made them legendary, weren't light boats Warpath1,Warpath2,The Banner boat ect. They were built that way by design not by chance. Its just simple physics. Heavier is generally not only stronger, but the weight it carries flattens the wave giving you a better ride and keeping the props in the water longer. I really dont want to get into a back and forth about this, but not too long ago I remember you were dead set on lighter was better in any condition, and I really dont want to waste my time finding the posts, they were just silly, so, Im just gonna assume you changed your mind.