Thanks for the link to the video. Yes, Tornados are fast, but not the fastest in light wind. Sorry, I've never seen an AC45 nor Extreme 40 cats on our swiss lake as yet but I have the chance to sail against quite a number of fast sailboats in light wind on Geneva lake. One of the fastest so far that I met is a Decision 35 cat : http://fr.wikipedia.org/wiki/D%C3%A9cision_35
In less than 7 knots wind, a D35 is faster than anything else on our lake, including Tornadoes, Ventilos, 49er, or even my Serenity + 11 m2 : no chance to match their speed on a beam reach. Even a foiler such as the exotic LX Mirabaud or the Pi28 Gonet have no chance :
In 7-12 knots wind, a D35 is still faster than anything else. I tried many times just to follow them on a deep reach with a large slalom board + 11 m2 sail. While I was speeding at Vmax 25-26 knots, they are doing 30+ knots easily. In those same conditions, I'm on par with a Bladerider whereas a Hobbie cat 18 is left behind very quickly.
Yesterday was a very interesting match race against the hydroptere.ch cat. In 10-16+ knots winds on a deep reach with iSonic 117 Wide + Reflex III 8.6 m2, I was speeding at Vmax 27-29 knots while they were doing 35 knots easily. Just amazing to see from behind how fast they are going over their 2 leeward foils...!
So again, I'd love to see a kite doing 3-4x the wind speed and beating either a D35, hydroptere.ch or even the defunct Alinghi 5 in less than 10 knots winds :