if there is anything in the DZ I think this theory is the most exciting so far.
But aren't some of the highest speed corners at pretty much the same speed they take the straights at? maybe the magical low speed cloud of air only happens at the highest speed or yaw plays a part.
If it was discovered on last years car, it looks like it won't require any exotic areo shapes so it might be hard for other teams to copy.
Speculation is fun but it sounds more than a tad far fetched to me!