Now if the ground was as slow to react as I am due to my advanced age and alcohol ravaged brain.....could the ground effect become operable well after I touchdown.....and the followup question must be to see if the ground up north amongst all dem yankee's reacts any quicker than southern soil? Could we get NASA to study this concept....and maybe come up with another isogonic line similar to variation on our maps...to depict areas of differing rates of ground reaction to rotorwash.....thus allowing us to be more aware of just where we might anticpate slow vs quick reacting ground? How would we factor that into our CAT A performance graphs.....now that is a very interesting question! Could it be our power assurance numbers are not taking into effect slow reacting ground?