Had an employee who was in the PNW Ocean after falling over board crabbing and lasted 6hrs with no hypothermia but no loss of limbs or organ failure.
However all the attention made his head swell and after some major mistakes on the job had to let him go. I say he has salt on the brain syndrome.
But the Drs. said his being 350 lbs and only in his underwear with floats in them is what kept him alive in 57 degree water.
no hypothremia should have been no severe hypothermia
I think survival has less to do with earthly matters (whether we're big or small), and more to do with how long God chooses to let us hang around. If it's not your time, a little fat, a truck, or a cold ocean isn't gonna kill ya.