Aeroports are tremendously more efficient when it comes to flowing air, thats why you can get away with far less port area per cubic foot than compared to slots.
It all comes down to fluid dynamics (yes airflow applies to this), think about it, why are pipes round and not square, rectangluar etc? Because round designs flow the best and are the most efficient, if this was NOT the case, then you would see different shaped pipes other than round ones. Theres the real answer right there.
If you answered that aeros have different sq or cant get enough port area or some other lame excuse, obivously they have little experience with aeros and have diaherrea of the mouth trying to act like they know otherwise.