I think it is clear from race 4 that ETNZ did not do as well in the tacks on leg 3 as in the earlier races. The average wind strength in R4 was 3.5-4 knots higher than for the previous 3 races. (R4: 20.1, R3: 16.6, R2: 16.1, R1: 16.1). Max wind speed in gusts was 23.3. ( http://live.virtuale...02_acstats.html )
ETNZ tacks were not up to earlier speed on R4 leg 3. Difficulties handling boat in upper wind limit strength/stronger gusts. Why do you think that was the case? Jib selection problem? Foil adjustment problem?