
Your first point agrees with what I said, and your second flat contradicts your first.
The fans are nothing more than ducted rotors - the duct improving the efficiency of the rotors. Ground effect is nothing more than a high-pressure zone of air caused by proximity to the ground - as you yourself said. It is clearly important for hovercraft and as evidence for this, ask yourself why hovercraft can't fly like helicopters.
As to my original point, right at the top of this thread - this vehicle is clearly operating in ground effect. Until they can make it operate out of ground effect they've achieved nothing novel other than a hovercraft with excessive power requirements.
( , Wed 22 Aug 2012, 14:06, Reply)

and hence the ground effect doesn't come into effect.
I'm off to Solfest now, so can't elaborate further...
( , Wed 22 Aug 2012, 14:27, Reply)