This is incorrect. Pathfinder is not a revised version of 3.5 D&D. Pathfinder is a game system derived from the OGL, similarities to D&D or not.Pathfinder is a revised version of 3.5 edition D&D; it is not a new creation, but a modification. Paizo's house rules of 3.5, if you will.
Now, I know some people will want to argue the semantics of the OGL = D&D, but the fact is, they are not one in the same. The OGL is a basis, a framework from which the D&D 3.x game is derived. This is also the same base/framework from which all clones and OGL games are created.
While they may all be classified as OGL games, they are not all D&D.
If players want to think of their OGL games as D&D, neither I nor anyone else can change that, but just because they want it to be true, does not make it so. That would be like saying that because Pepsi is a dark, sugary, carbonated drink, that it is Coke. They may both be derived from a similar formula, but one is not the other regardless of how many people enjoy drinking both and "personally" consider them to be one in the same.