ditto. i paid no mind to it until i rode my first eps/epoxy handshape. holy crap, what a dead feeling board!
yea, that little kerfuffle is exactly why i mentioned the differences. didn't want another of those "oh so & so is ripping off tomo" things to develop when it's clearly a different concept being utilized for a different purpose.
This kind of tail would be kind of a mid-point between a mini-simmons (big wide squash tail for maximum rear planing area- great for speed in soft small waves but lacking in hold) and a true "retro" fish (wide tail with big deep swallow cut into it reducing the rear planing area and creating twin pin tails for much more hold on steep waves, but slower in soft small waves) I have never ridden this, but the Bing Dharma is pretty close to this shape and is a great board.
2 cents...The fish - you know the real Lis fish that was a knee board- was 2 pintails fused together. I think the pintails were very popular then as was the high trim and tube navigation style of surfing. Real fish are short boards with straight lines both rocker and outline that is intended to let the hull skim fast with less or no curves for the water to move around. On those old fish even the keels were straight or parallel with the rail for longer arcs on turns and weaving through bowls. That butt crack tail is kind of the same thing going on but with squashtails and simmons style hulls. As far as flex goes how much do you think 1' of crack is going to flex? Why do you want it to flex? Can't be much difference if any at all.
I've been riding a tomo vangaurd and its great. The tail seems to help hold on the face. I'm not exactlythe specific job of the tail but the board as a whole performs like a rocketship/skateboard in the water. I put on some qauds and the board seems to handle better. Ill never go back to a traditional board.