Here is the applicable most current rule from the ISAF:

89.3 Scoring
(a) The race committee shall score a race or series as provided in Appendix A using the Low Point System, unless the sailing instructions specify the Bonus Point System or some other system. A race shall be scored if it is not abandoned and if one boat sails the course in compliance with rule 28.1 and finishes within the time limit, if any, even if she retires after finishing or is disqualified.

Sounds like it should be thrown to me. The only argument you could make would be if you thought that the boats sailed the proper course because of a lack of a proper signal from the race committee.

It was a fun and windy week. Lot's of room for improvement on my part. I think everyone got there money's worth on the race course and off.

Mike Hill