Take an aerial snapshot of a peloton and you have a bell curve.
But a peloton represents a moving, fluid bell curve. In a bell curve the "fastest" is in front, the "slowest" in the rear. In a peloton maybe the fastest had a flat and is now in the back and the best climber is in the front as the peloton heads up into the Alps.
Is the true nature of a bell curve, a churning, positional shifting peloton where we just happen to catch a snapshot of one, particular moment?