landyacht said... maybe if Gizmo did his CE/CR thing on the ptera sail we could see why all the videos seem to be sailing down wind

Im not even going to try that one ... its WAY in front of the front wheels, It would fun to watch someone sailing in 30+ knots it would be so hard to control.
Jibs have a larger angle of attack than a sail on a mast so it would sail much better off the wind rather than pointing high. (more power less speed)
Thats why on cruising yachts many people will often sail on just a No.1 or 2 genoa rather than a mainsail alone if they are sailing short handed.