A further experiment and update on the mulloway work will be in Fisho this year.
Results are clearly straight cut but you always need that field component to your experiments.
RE: in a tournament fish are picked up by a marshal boat and taken straight to the sea cages and yes there is a component of travel time. All other factors as you said such as play length, exposure to air, bleeding, scale loss, hooking location, line strength, bait type or being netted are all taken into consideration.
cheers