At Qantas recurrent training (ep's) are every 6 months. She obviously passes or else she would not be able to crew a flight. Also as crew are last off in any emergency what does it matter to you the passenger if she can't fit out of the exit?? I do work with some very large ladies and besides them being extremely good at their job and a pleasure to work with I have no doubt in my mind that they would fit through any exit on the aircraft in an emergency situation.