for efficent engine cooling under high power settings whilst stationary.
Actually, the amount of air moving through the cowl at high powers settings is going to be controlled by the airflow through the prop, and the difference between into wind and out of wind would be hardly noticable.
The into wind position is going to be most benificial at low power settings, where the airflow through the prop is going to be minimal.
All the control surfaces being into wind is also a valid reason, as they are designed to have airflow going over them from one direction.