Bullshit. Nole was never schooled in any Grand Slam.
He was inmature, he had too many physical problems, specially allergies and heat exposure, his serve was ruined... lack of confidence and belief against Fedal like the rest of the tour... those were the factors. Also the pressure from his family and country, the change or racket... nothing of that helped.
He lost in straights to Safin (who said grass is for cows) at Wimbledon
. Routine wins for Nadal and Fed at RG, USO. As for the rest, maturity, allergies, physical problems, lack of belief, cry me a river. All part and parcel of being a player in a competitive sport. You might as well say 'If David Ferrer was better than everybody else all the time and had no physical problems, letdowns, loss of motivation and competitive rivals, how many Slams would he have won?'