I've pointed my asymetrical, dual centerboard equipped Gemini to 35 degrees off the wind, measuring only 5 degrees of leeway (per my Lowrance
GPS). Rather than weighted mine actually float as catamarans are not lead dragging mono hulls.
Consider not only the shoal draft, but downwind performance increase you get due to the decrease in wetted surface - combined they make a swing keel or centerboard boat a perfect cruising platform (provided the rest of the boat is up to that). They are perfect for anchoring where no one else can go and maximizing miles per day on long downwind passages.
Up creek from me (in thinner water) is a Nightwind 35 centerboarder that could only make it to it's slip if it was a cb boat - and it regularly terrorizes the local (Magothy river) wednesday night racers.