And here is the quote from Madforsailing.com (AKA thedailysail.com)

maybe I'm intepreting it incorrectly :

"The old Formula 40s were faster than the Alinghi cat at high speed. But that was not the target - it was not the objective to reach high speed." The objective was to sail fast in light winds and the conditions found on the lakes.

Upwind the VPPs of the Decision 35 indicate that they will be sailing at 1.9 times wind speed with a top speed of around 13 knots. Thus in 4 knots of wind, which you often see on the lakes, boat speed will be approaching 8 knots. Compared to the Alinghi cat the Decision 35 will be a little slower - Schmidt reckons that in 12 knots of wind, it might be 1 knot slower, making 12 knots instead of 13, but he believes that because the boat is a one design, the optimisation programs carried out by the teams will bump up the performance"

Wouter