Id be tempted to disagree, people deliberately put in a mechanical disadvantage so that the flipper doesn't move so quickly that ran doesn't have time to come up to full working pressure and so wouldn't be delivering the full possible force. But in an HP system I thought the higher pressure meant you got much better flow so I would imagine you wouldn't need the mechanical disadvantage as the ram would come up to full pressure very quickly.
I'm by no means an expert on this so feel free to tell me I'm wrong but sounds logical to me.