Its uncertain just what happened to AWEC, the insiders have never disclosed the process. Olivier may be right to suggest it was a “conspiracy”, but until the actual facts are public, that’s just one guess.
The latest experiment was not for measuring power, only for operational research. John Borsheim. PE, made kPower’s first AWES power meter in 2008. There is little value in a single data point in low wind, what counts is full power curves later. Due to low wind and no load, this was a <10W class performance by the 1.8m2 wing, mostly just to fly and lift the lines.
Its a wild leap from seeing cranes as one of a long list of load-connection models to thinking we need them on a kite field. The experiment was aimed at showing how little hardware is needed. Alpinists do not need a crane to climb mountains by anchor belay.