Funny, but the first race was won by a Hobie 18, no spin and that record held for about 7 years, despite all kinds of hot boats with spinnakers.
Depending on the wind direction and velocity, sometimes you cannot use the spinnaker that much.
Couple of things, however, is that this is for two-person boats only and PN of 72 or less. The discrimination is for safety and so the RC does not have to sit on the beach until 3AM. <img src="http://www.catsailor.com/forums/images/graemlins/tongue.gif" alt="" />
Rick