let me get this right if i send you a lets say 2  large letters together, 1  priority  and 1 normal..  the priority will get there roughly the same time as before,  but the normal one will be slower  . so 1 letter comes lets say monday the other lets say wednesday,would it have been faster if the postman dropped both letters to you on monday , instead of 2 different days , and how are aus post going to save any money this way.