Has Kareem Abdul Jabar gone mad?

After Pippens recent comments about Lebron James being the greatest player of all time people believe he is mad he makes a point, a bad one but well explained in Kareems recent rant I'm led to believe he's mad, in this letter to Pippen he says that Jordan must take a back seat to Chamberlian. He makes valid points but do people honestly think he would have a tenth of the sucsess that he had in his day remembering that that was the era of the big man. Shaq,Hakeem,Ewing and many more great big men has Kareems lost his mind?