I have noticed the same simularities as mentioned between cycling and hypermiling.
But if you are comparing bike aerodynamics to the ecomodded cars the velomobile is much closer,
plus the riding style is even more related as energy conservation is more critical in a velomobile, accelerate down hill so the streamling will help up the next, accelerate on the flat before smaller hills so you dont have to over work going up, the streamlining allows you to achieve and maintain a higher speed but the weight becomes a major issue on hills.
A bit like driving an under powered very aerodynamic car.