FL,

The acceleration we're talking about isn't from the bow, but the wind. The amount of area will largely determine what force a given wind velocity will exert on the arrow, this force locks in the amount of acceleration the arrow "feels" and so how quickly it ramps up to match the wind speed, neglecting weathervaning effects.

From the arrow's point of view, if you suspended it in a wind tunnel and blew air over it, or shot it out of a bow, the drag effects would be the same, the higher the velocity or the more area equals more resistive force. From the front this would de-accelerate it, from the side accleration would be felt(again neglecting weathervaning).