As it turns out that is exactly the kind of fit that Payton is.
Did he finish?
“After the first 5 yards of pushing that sled, my goal was to finish. It was tough ... I didn’t want that sled to be sitting there, halfway between the sideline and like five players have to pull it back for the next heat.”
Yes, he finished.
He had intended to do it earlier in the week in order to see what it was like, but a chest cold forced him to hold off. He still wasn't over the cold, but opted to do it anyway.
So either the test is too simple or Sean Payton is a beast.