I have been taught that "retard" call out on normal approach is a guidance call out (a reminder), in reality if you dont at least begin to retard power you will end up floating down the runway past the touch down point, as the autothrust will come in and try to maintain Vapp. It is different if it is an autoland, in this case the retard call out is an instruction. And yes i am currently flying an Airbus. Hope this helps.
Regards, Mondeoman
