Hall of Fame
In your opinion it is. In my opinion and in the mind of the greats of the game (those who have won 4 Slams or more, and who have a better idea than anyone on here of how to win a Slam), it is not. For one thing, 2006's competition that year was forgettable compared to 2011 where he redlined for months against a very formidable field.
You left out a couple.