Think of it relative to how the ski naturally planes out. If water temp was the only variable, then in very cold water the tail of the ski would not ride as deep, think of ice being the coldest water, the tail of the ski would ride on top and not sink at all. This could be why a lot of out the fronts happen in colder water. Adding more wing brings the tip of ski down and thus the tail of the ski up. Reducing wing angle brings the tip of the ski up and lets the tail ride deeper.  So more wing angle seems to only increase the effects of cold water, and less wing angle would seem to reverse the effects of cold water.