Many seem to be assuming that the "lots more documents" have yet to be released.
It's possible that some are, as yet unreleased documents, but I think many of the documents may be the actual documents about Bush from DOD.
Maybe SeeBS gave Pierce the six forged documents (4 released by CBS and 2 additional later released by USA Today) and a large batch of known authentic documents released by the Pentagon.
My theory is that Pierce was to compare the two types of documents for consistancy.
Two possibilities under this theory.
(1) Pierce never completed a detailed comparison of Kinko documents to the batch of real documents. CBS jumped the gun citing him as an authenticator when he had not authenticated the Kinko documents. (This possibility is consistant with the story "Pierce said that the reason he hadn't rendered a final conclusion yet was that he was only “midway through his analysis” of all the documents.")
OR
(2) Pierce gave a final OK to CBS on the documents, but he is trying to avoid having his professional reputation dragged down with CBS' and Rather's reputations. This scenario seems unlikely to me, but CBS will probably try to pin Pierce as one of the fall guys.
Why would they want to authenticate documents released by the DOD? And how would a document examiner be equipped to do so? Unless he is a specialist in that particular type of document, he wouldn't be in a position to authenticate the style and jargon (the form and printing system would, of course, be authentic as could be).
Instead, I wonder if the additional documents are handwritten. Matley's specialty was handwriting analysis, not document authentication. What is Pierce's expertise?
Because, at this point, has not the ground been prepared to introduce handwritten documents? Killian's family and associates have all established that he did not type. Hodges was left with the "impression" that they were asking him about handwritten documents.
What if, for his next act, Rather introduces six handwritten documents that are otherwise textually identical to the Word docs? And they are attested to as being in Killian's handwriting?
It's a long shot. But it should be recognized as a possibility.