First: The White House did not question the authenticity of these documents when CBS presented them.
Second: It's really disgusting to know ahead of time how this is going to play out. Something along the lines of, "Questions surround authenticity of documents. Can we know the truth? Experts in disagreement." For the Bush people, this is all they really need to put this issue to bed politically.
Third: An enterprising Kos poster has gone through the complaints about these documents and convincingly debunked each one. Unfortunately, the public's attention span is not long enough to deal with anything that goes past "Experts in disagreement."