........And lastly, at the bottom of the wave, the boat with greater form stability would generate more righting force, remaining in sync with the wave surface and so would be less likely to dip a deck or spar and keep rolling.
What all of this suggests is that the specifics of the boat design and the conditions will determine whether it heels relative to the wave surface, but that the use of a fin keel or full keel is but one minor factor.........
I always enjoy Jeff's informative and thought provoking discussions.
If I'm understanding this correctly, the modern boat remains in sync with the wave surface by generating more righting force (due to it's flatter wider shape). The greater righting force is also generating more rapid and continuous (rotational) acceleration. This greater acceleration would be more exhausting to the human occupants.