Been chatting to the DefiWing people and they said you can click on the rider and it will show you the timings and they have just added the calculated speed to results. Currently it's in minutes/km but they are going to change it to knots.
my.raceresult.com/244941/Something still wrong with the numbers though, you get the same timing and speed for every race. Have let them know, hopefully they fix it.
All indications are that the wing foilers could give the wind foilers and the fins a good run for their money, so much for dinging is slow and boring