Bluewater boat comparison
To address Rich H points:
Those of us that grew up sailing on heavy weight boats grew up with the mythology that light boats are inherently uncomfortable and more tiring to sail. This belief was further reinforced as we began sailing the first generations of light weight boats. Boats that basically had hull shapes like the heavier boats but just reduced in weight.
The opinion that light weight equates to discomfort was further reinforced by the raceboat inspired light weight boats of the 1970''s and 1980''s. These were boats with comparatively deep canoe bodies, blunt bows, pinched sterns and high center of gravities.
Marchaj''s data in his seminal work on seawothiness was based on data in which the light weight boats used in the study were prototypical IOR boats of the era with comparatively deep canoe bodies, blunt bows, pinched sterns and high center of gravities. His data and recommendations were right based on the type form he was studying.
Designers heeded his advise and reshaped hulls and lowered centers of gravity, moved weight out of the ends of the boat, lengthened water lines, reduced both deck and waterline beam, and reduced the reliance on form stability.
Todays light weight boats are not the light weight boats of the Fastnet disaster era. They are a new breed. With the ability to actually instrument full size boats we are finding that weight distribution,and hull and foil shape can actually result in boats that are light in weight and that have smaller roll angles and similar accellerations to the heavier boats that we grew up assuming to be the only way to go to sea.
Our other image of light weight boats comes from the first generation sleds.