Stewart,

The (original) Texel Rating number for the F16 solo is a bit closer to reality I think than the ISAF number. A small list to compare:

Boat; Texel Rating; Isaf Rating

Hobie 16; 117; 1.16
Formula 16(1); 101; 0.97
Formula 16 (2); 102; 1.01
Formula 18; 102; 1.01
Tornado (new rig); 94; 0.94

Geert