I find the same thing at my local.
Fat roll-in take off where you need paddle power, early planing and you either have to fade the take off or do a nice deep bottom turn into a carve rather than attempting a vertical turn back up the face for a lip attack that isn't there, resulting in a bogged rail if your riding a typical high performance board without the planing area.
With luck the wall then opens up into a nice workable section that occassionaly barrels before going into a closeout.
So a board like the flying fish is in its element. Over many years I've dialled in my boards and know exactly what works out there but most people dismiss it because they are trying to ride the wrong kinds of boards there in typical surfing for point score style.
On an un-related side note how's this cool explanation of double concaves (which I have on some of my favoured boards):
This comes from a shaper of "normal" boards on a the paipo forum.
There's even mention of longboards in there. "I agree with both Skiff and s-glider. What I would call "closed-end" concaves provide lift. The lift is supplied by the diversion of moving water from a line parallel to the bottom, to more more downward flow. For this effect to take place, the entire concave must be in the water, as S-glider states. This "lifting" action is best shown by the "spoon-in-the-faucet-flow" demonstration. Turn on a faucet, hold the concave curved side of the spoon into the water flow and observe the spoon being push away from the flow or "lifted".
Conversely, hold the convex side of the spoon into the water flow, and feel the spoon being pulled into the flow. "The typical nose-concave on a nose rider works on this principle, with the lift generated preventing the bottom from sinking too deep and causing drag when the riders weight is on the nose. The bi-lateral concaves in a dual-concave bottom work in a similar fashion as Skiff mentions. These dual concaves are located on each side of the stringer in the rear of the bottom, which is the part of the bottom with most contact with the water during a turn. Lift here (on one side or the other) keeps the bottom from sinking too deep and causing drag when turning.
Concaves have a secondary function which is described by Dick Brewer in "The Surfbook: How design drives performance". Brewer points out how concave bottoms change the shape of the rail, increasing the angle of attack of the rail relative to the wave face, which results in more upward lift captured from the flow of water up the wave face. Brewer adds that V bottoms do just the opposite, releasing more easily from the wave face.
When I put V in the tail of my longboards, its because I want the rear third of the board, when weighed, to drift down the face while the front 2/3 of the board is drawn up the face, resulting in a nice, short-radius turn. 
The combination of dual concave and V (some call spiral-V) results in a particularly loose performing bottom. The impact of concave on rail performance is mostly seen in single-concave boards. Single-concave boards, without a little V to encourage release, are indeed stiff, but extremely fast. The force of the rider's weight brought to bear on the rail is converted into forward motion as the rail bites into the upward flow of the wave.
But there is a second type of concave which I refer to as an "open" concave, which while closed at one end, is completely open at the other. Like half of a funnel. Bonzer concaves are the best examples of these open concaves. These concaves primarily serve to direct water flow. But, when located close to the rail, they can also serve enhance the rail shape. On the G4, I want these open concaves to (1) act more like afterburners, encouraging water accelerate out the back of the bottom, and (2) to enhance the tail rail, giving it more "bite" into the wave face. Just my $.02..."