The amount of surface area in contact with the snow at a time most certainly does make more of a difference than the type or amount of wax used.
Let me explain this to you instead of arguing in one line sentences like yourself my friend.
What your saying is like saying how big a car is, is more important to its movement then it having spinning wheels. Like wax the wheel was the incredible invention that kept momentum and gained speed down hill. How is a vehicle suppose to break friction and gain speed at any size without spinning rubber tires are the equivalent to your wax on your board. This is the only thing for the board that's touching snow to start breaking friction and carry speed. Whether you push a large or a small object down hill they will both have the ability to move very fast with spinning tires on axel on ground or surface wax on snow. Large or small a snowboard with a sweet wax job will fly. Take the Wax off a board or remove tires from a vehicle, no matter what the size it is, it will barely move.
This is why Snowboarder's and Skier's have what are called wax techs not board size techs. Although I'm in no way saying surface area and size donesn't matter, I'm just saying nothing's moving with much speed on snow with out something to help break friction touching the the snow.