Madbob - you do know the difference between CAS and TAS, I trust?
A400M having similar performance to a Belslow? I belive the geek expressions are YGTBSM and ROTFLMAO?
Love to see a Belslow try to reach M0.72 at F370. Or any other of the old relics with which you've compared the A400M.
Last encounter I had with a Belslow was in around 2002 when I heard one pottering along at around FL160 on its way back from Dakar to the UK. Hope they made it before scurvy broke out!