I think i have been clear about what i meant. Being aero, having a low CdA, means your front aerea hits as little air as possible and your shape allows for as little drag behind as possible. This can be due to bodyshape, size and positioning on the bike, which in its turn is also decided by how flexible and agile a person is. The fact of the matter remains, that a person who is by nature able to cut through the air better, will see less improvement from going from a road bike to a TT bike, but will also lose less of his advantage by going from a TT bike to a road bike.
You can try your best to frame my reasoning as something controversial, but it is not.