For this topic and for A (train of) parasail(s) as AWES ? - Engineering / System Design - AWESystems Forum, I should have started with the following information and graph, which I was able to verify by going through tons of publications.
nakka-rocketry.net/Appendix-K.htm:
[2] According to Res.K2, the drag coefficient greatly increases at low velocity
cross-chute-drag-coefficient.jpg (709×772)
All the high CD parachutes operate at a low sink rate of 3 to 5 m/s. We can deduce that parachute or parasail-based AWES would be advantageous at low wind speed.
That said we can see that the same (but in another proportion) is true (regarding the thrust) for crosswind kites which cap at a certain wind speed. I myself was able to observe that the traction was generally less than the square of the wind speed because of the loss of efficiency.