The documents may or may not be forged, but the WH certainly hasn't made that argument.
It may well be they're not making the argument because they think this will blow away if left alone and don't want to add fuel to the fire.
Then, perhaps Drudge ought to make the argument. If there is good evidence to support a forgery, this is one heck of a story. Much better than the AP Tom Hays bogus "booing" story.
Considering the MSM will never print a retraction, it is best to just let it all blow over. I was at a large gathering of people yesterday, everyone was talking about the SBVs, no one was talking about Bush and the National Guard. People are not stupid and besides this is old news.
Commenting on the documents would only lend legitimacy to the issue. The public will do the job for the Whitehouse.