ahh you would be wrong there dukk... and I will maintain that the only way it could sound different is if in fact the tuning was different....
as I said a regular port that is the same length as a aero port will not be tuned to the same frequency........... and that must be the difference you speak of; and is probably what was being demonstrated....
of course unless it is was a double blind ABX test your comments wouldn't be valid anyway.....