I've heard the terms torsion boxes and rocker boxes used to describe the same thing hear on the board - what VT posted in #7. For instance, WES has the same photo posted on his site and he calls them Rocker Boxes -
http://classicheartbeat.com/catalog/...er%20Boxes.htm.
"You like potato and I like potahto, You like tomato and I like tomahto
Potato, potahto, Tomato, tomahto, Let's call the whole thing off"