I think Marks question is a reasonable one.
I do think the 2 or 3 race limits are foolish.
Sit on the beach for a day or two and then go sail 2 races on a perfect day? <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" />
The National events are being held to crown a champion and to promote the sport.
Sailing 7 races in a day becomes no fun and can drive away the bottom half of the fleet and maybe some youth.
When I have raced with my daughter at Nationals our goal was always to finish all the races. If I did that I felt that we would shake out mid pack(not bad at 16's).
I don't know that I could expect a teenager to stay out for 7 races in those conditions.
I'm thinking a 5 race maximum would still identify the best sailor and keep it fun and competitive for all.

I have said it many times.
The Nationals should crown a champion and make everyone else feel like one.