I see that the Infusion and Capricorn have "wing masts", which appear to be modified teardrop sections. These appear to be quite different from what Bethwaite refered to as a "wing mast" in his 1993 book High Performance Sailing.

Bethwaite's wing mast is a laminar flow section with a square back just after it starts to narrow. This design neatly minimizes the inevitable separation bubbles behind the mast on each side of the sail, was developed in the wind tunnel, and improved the power of the main by 10+ percent compared to a conventional mast. It also leads to even better improvements in extremely light air (<3kts).

So, does anyone know if the Capricorn and Infusion "wing masts" are designed to perform similarly? Or are they simply more streamlined versions of the conventional teardrop? If not, why does no one use the Bethwaite design on a Cat?