Hi Marcus,
I agree with you, which is why I said that windsurf type rigs wouldn`t work on a cat. My real point was to clear up the misconception that windsurfers don`t adjust sails while sailing, for sure the majority of recreational windsurfers don`t but at a racing level things are different.
I think a compromise beween the two would be ideal, we see squaretop sails and tapered masts in cats, the aim of which is to let the top twist off and reduce power high up in gusts, resulting in an icrease in speed with a reduction in power where you don`t want it.

Wouter, what I meant is that windsurf racing sails have a much better aerodynamic profile than a standard catamaran sail, in section. Similar to the difference between a modern paraglider wing (double surface) vs. an older single-skin hang-glider wing section. Have a look at the new Neil Pryde RS Racing sails, or Naish Stealth sails - they have camber inducers and very wide luff sleeves which increase the aerodynamic efficiency of the sail considerably vs. a non-cambered sail with narrow luff sleeve. Of course the modern wing-profile mast you have on the Taipan rig goes a long way to narrowing out the difference and is probably not much less efficient than a windsurf race sail profile.