The climb requirements are nearly always impossible with a loaded 320 or 321 - don't start on the Bus/Boing argument. I politely advise we are unable due weight and give my best level at the current speed. I am loath to reduce speed to try and achieve an unattainable level, only to then have to fly level to accelerate in order to climb. Hopefully, when enough folk do similar, sensible boundaries will be arranged
