26 knots reaching with a kite in only 6-9 knots wind ? 3-4x the wind speed ? That's pure BS all the way.
Reality check is that nobody is kiting in such low wind except 1 guy with a Speed 3 Flysurfer 22 m2 kite and a raceboard with 4 big fins on my home lake. Truth is that he barely exceeds 2x the wind speed, i.e., 12 knots kite speed in 6 knots wind. That's exactly what I do on Serenity + 11 m2 sail BTW...
Should the wind drop below 5 knots, the kite is swimming while I'm still flying full speed as described above. Should the wind drop down to 0, I can still pump the big sail and reach a top speed of 5-6 knots with the Serenity while the kite is still swimming and calling for the rescue boat.
Time to get to real hard facts and stop the kite fantasy...