I do not know how you think or what explanation you have for this statement. I do know that everything is depending on timing AND massflow - this in turn means that higher massflow at an early state will be compensated by camtiming and this in turn helps us with the wider powerband (which is all i was after - not maximum peakpower only)
A lot (if not nearly all) of this result is up to the turbo (at least with the engines that Erland talk about).....
I have seen examples of his result at 500+ Hp on B230 engine @ 1 Bar of boost - this means that 2 Bar should give us in the region of 750 Hp (why is it not like that?)
Answer is the turbochoice - with a turbo more suited for 750Hp @ 2 Bar it would have been the result.