ok. I have now had a chance to ride the Quad in onshore conditions. Conditions were 25 - 35 knots, bigger sets head high, sail 4.7.
The additional volume is really nice when you are in the impact zone where the wind is always a little bit less. It was easy to get out of the way of the bigger sets and the additional float is nice when you do have to chicken jibe and get away from a wall of white water.
Now to the riding. While I was maxed out on the 4.7 there was a lot of tail walking happening. Realistically the board was too big out the back. Especially when it get's choppy it's difficult to convert the power in your sail into speed. I have a feeling this actually more to do with the short length of the board than the actual shape. That said despite being hopelessly overpowered in the gusts I surprisingly was still able to jibe without much effort. That really blew me away.
Again once you get on a wave the board comes into it's own. Back side or front side riding wasn't a real issue despite the wind coming cross on and me being a little overpowered. It really drives threw turns like it's on rails.
On the way back out you need a bit more wind to get going while pointing up wind. Still it was easy to just point a bit down wind give it a couple of pumps and get on the plane.
In summary I'd say this is a pure wave board. If you are a heavier sailer who only sails ocean side and in waves this could be you board of your dreams. It has a huge wind range. It certainly has opened up a new area of windsurfing for me that wasn't available before.
I am now keen to give the 94 / 87 a go and perhaps add it to the quiver. Fanatic are you listing???