While I would certainly agree that 3.X is D&D (as I said earlier, I view d20 Fantasy as the engine and D&D as the game), it is interesting to me to note that, when I was proposing house rules in earlier threads (those Sense of Wonder threads that made EN World crash in an attempt to forget), a number of the people who are of the "It's all D&D" camp suggested that perhaps I would be happier with a different game, or that they would not consider what I am doing D&D.
So, if this was true earlier, what is the difference between a heavily houseruled 3.X game that would make it "Not D&D"? Especially if the modifications were less severe than those between editions 2 and 3?
This is a serious question, in part because I believe that the answer probably bridges (to some minute degree) the two points of view re: 3.X.
RC