I don't think it's worthwhile trying to compare the performance of a MkIV Boyer with the latest designs. It's a 15 year old design and it's performance is not comparable to the current designs. I had one when they first came out and recently had one for a while. It doesn't compare to my Geltek Flyer II.
I've also sailed 15 races across a range of conditions recently against DNA's and Scheurers. While they are fast and seem well suited to flat water, they certainly aren't game changers when compared to Tools, Gelteks or Marstroms. It's still the quality of the sailor that is making the difference.

The current Australian F16 champion on a Viper regularly beats the latest A's sailed by top 10 world ranked A sailors over the line in anything over about 10 knots. They aren't faster to windward in most conditions but they aren't far away. In fact I sailed in a 50 kilometre marathon race yesterday with half upwind and half downwind and the Viper beat a very highly ranked A by about a metre.

How does all this relate to the speed of the new Nacra - I haven't sailed against one but looking at the specs I'd think it would be considerably faster than an F16 and should walk away from an A to windward in anything more than light breeze.

Maybe one will turn up in Australia one day and we'll see it against arguably the quickest A fleet in the world!

Cheers