[aerohead]

Independent verification in a full-scale wind tunnel would be prudent.It would cost them less than $500 at the A2 tunnel for the full kit.
If they'd provided the data cloud to Tesla,and Tesla achieved the same results it would lesson suspicion.
Had they developed their hardware in a tunnel,they'd be out a minimum of $429,000,according to their 143-hours/iterations reported.That doesn't include envelope digitizing,autocad/cam,prototyping,transportation,perhaps one master clay modeller,additional manpower,equipment,travel expenses,lodgings,per diem,etc..