Every interview with musharraf i have read, i have noted he has made all kinds of apparently candid comments, in some cases quite open about problems he has had or things he has done or not done. this guy is next to death's door (not from the US so much as islamic elements in his own country) and apparently has done quite a bit despite multiple attempts to kill him.
i have no doubt the stone age language might well have been used. pakistan would not be allowed to be neutral in september 2001.
in case my previous comment gave an erroneous impression, i know full and well that realpolitik rules any country's and presumably any dictators underlying motives (barring the megalomaniacs), but in spite of this musharraf has made a number of interesting comments that almost couldn't be made up (or at least had no apparent motive for such).