Yes, the Hysucat was a very wet boat. The problem has largely been resolved by re-designing and enlarging the take-up funnel under the bow.
See pic attached.
The problem was the fact that the water had no-where to go in a moderate stuff or in adverse conditions. The enlargement of this area means more water is forced up the funnel/tube instead of of outwards and hence upwards onto the boat. I think you will find Tim and Gavin loved the Hysucat and it would be interesting to know exactly why they sold her (if indeed they have) and bought a Redbay. We sold ours simply because we had outgrown her - in retrospect, the Hysucat was the most fun we have ever had in a rib. If you enjoy skiing I believe there is nothing quite like the Hysucat as it jumps on the plane in a metre or two and has virtually no wake to speak of.
It is important to note they you have to learn how to drive one properly to get the best out of her, as it is not the same as a mono-hull.
BTW Ezgoing, have you ever been out in one?