Throttling really effects the boats ride and attitude. Keeping the "momentum" up is important. I usually go hard on the throttles just before we launch, it keeps the bow level and straight, back in it just as the props (not the boat) hit the water.
My boat runs low 80's WOT but in rough water (5+ ft) I've seen mid' - upper 70's because the drives are tucked in and the tabs are down a little. My props are set up for best cruise speed and WOT but with a smaller prop it would run even better in rough water.
In a 2-3 ft. chop the boat runs it's fastest.