Tam is that you? How is the business going?
Nick Lappos will certainly not be happy with your use of the phrase 'building a ground cushion' as it is one of the urban myths he has debunked on these very pages.
The phrase cellular absorption implies the grass cells absorb the energy from the moving downwash - this would slow the air and produce a higher pressure under the disc - according to the CFS teaching this would work to improve the ground cushion.
Personally I think that long grass gives the beginnings of recirculation but that's as technical as I get on it too.