The code 0 doesn't seems to perform, it was maybe just to confuse the other sailors.

From ISAF website
Spain’s two-time World Champions ECHAVARRI and PAZ hold a four point overall lead after their win in race 3 and a sixth place finish in race 2. Following the day’s second race in very light 5 knots winds, ECHAVARRI added his view on the controversy that has been surrounding the Code 0 sails, designed especially for light wind conditions that are being used by some teams. “During race 3 there was very light wind – the perfect conditions for Code 0 boats. However, the Code 0 boats didn’t perform very well. Looking back at the whole scenario before the competition with the selection between Code 0 gennaker and standard spinnaker, we are glad that we made the right choice,” ECHAVARRI said.

/hakan