If people could get over themselves there would be no edition wars. Clark Peterson is just saying "Pathfinder is D&D" for him, not the whole world.
Castles and Crusades is D&D, for me. For others 4E is D&D, for them. Then there are those for whom 2E, 1E, OD&D, etc... is "D&D", for them.
So some of you think 4E is "D&D". So what? As long as your having fun why should anyone care what others prefer as "their D&D"?
We each play the version of "D&D" that gives us the rules that allow us to do what we want with "my D&D". I don't like what 4E, 3E, or Pathfinder has to offer. So what? I am not ruining any of your games because I feel that way. Nor are any of you ruining my Castles and Crusades games because you like 4E, 3E, or Pathfinder instead.
So why edition wars? Why get bent out of shape because someone dares *GASP* say they think "X" is "D&D"? Everyone just needs to get over their personal ego's and accept that we all play "D&D", our own D&D. Whatever edition or variant that may be.
Its friggin D&D, and we all play what we play to have fun. Whether its Pathfinder, 3E, 4E, C&C, 1E, LBB's, whatever. So get over yourselves already. Go play.