Yup. It helps make the boat more slippery downwind. You still want enough board in that the boat mostly travels in a straight line (it's faster that way) and to ensure that you have enough bite in the water to fly a hull...but you're aren't too concerned about maintaining height since you're object is usually further downwind from your angle (so deeper is better). The boards present a good bit of drag - enough that you can feel the difference up vs. down...so up enough to maintain straight travel downwind but reduce drag.