I would have thought that the competing yachtsmen would have been REALLY, REALLY pee'd off with a load of eggwhisks churning up their wind.
Now someone tell me the air-displacement involved in keeping umpteen tons of metal and humanity aloft, has no discernable effect on the airflow across the sails of the subject-matter.
perhaps... though I bet the sponsors wouldn't have a problem with the race being plastered over the TV screen... No bucks, no buck rogers..
** Edit- what ascend Charlie says below. There is no discernible difference unless you fly right over the top of them..