Understand that sidecut depth isn't going to directly affect edge to edge quickness. The deeper the sidecut of a board is, the shorter the distance it will take to turn when on edge. This could be good or bad depending on the style of riding the person likes. A deeper sidecut will turn more quickly, but can be less stable at higher speeds. While more stable at higher speeds for freeridng, a shallow sidecut will not turn in quite as short of a distance when compared to a deeper sidecut. In general, the wider a waist on a given length becomes, it can often be seen that the turning radius becomes larger as well. The Nation is designed primarily for freeriding which is why it doesn't have a super deep radius.