Have A thought as to the arguement why not. I am able to ge to matthews site this late in the evening But believe that most of there bows now are ajustable to 65% let off (for P&Y) which in something like the new SwitchBack with a 7" braceheight @ 70# would definitly transferr into that heavy hitter long as keep shooting something in the +10 gpi arrow (not broad head) plus the broadhead at say 125 grains.
My thinking is this a 65% your letoff is not a great meaning there is more push off the release and the 7" brace height is a longer push on a 30" arrow...More K.E. Just my interpation.
good luck
Greg