Caught this on the tele tonight.
I think to claim a world record it now has to be in a certain depth of water.
Never been to Sandy point, but there is a good chance the windward hull/float in in very shallow water.
But this is a really great achievement considering I think they are achieving these speeds in sub 20knts or close to it.
http://www.macquarie.com.au/speedsailing.htm