It has been mentioned in other forums that the 700/800 series of the 73 family has faily 'ordinary' field performance in that at MTOW it requires a greater TODR than the 300/400/500 series - of course the MTOWs are greater but with a wing that is not a great deal larger and also possibly a lower power/weight ratio (?) TODR is going to increase.
Any 73 drivers to confirm (or deny) ?