Mark,
Regardless of what we use for race marks, we usually have a healthy dose of upwind/downwind. And looking at the numbers, I'm not sure the wind corrected figures would help much until the highest wind range. Seeing the A's perform boat for boat for two seasons against other different types of boats upwind, downwind, and reaching, I'd still say they have a favorable rating.
With the 6.0, I always hope for a little more wind and wave to see if that evens things up a bit, but those hopes are in vain - the A's perform well in those conditions too.
Come sail with us more often, you'll see what I mean!