When looking at these new slides with commentary, I find them hard to reconcile with the Google statements about access, but they're not completely contradictory. This line from the slides commentary in particular is new (I wonder if it summarises other slides considered too compromising to reveal?):

Washington Post - The FBI uses government equipment on private company property to retrieve matching information from a participating company

The statements by Google seem to contradict this on first reading:

Larry Page - "Second, we provide user data to governments only in accordance with the law. Our legal team reviews each and every request, and frequently pushes back when requests are overly broad or don’t follow the correct process. Press reports that suggest that Google is providing open-ended access to our users’ data are false, period. Until this week’s reports, we had never heard of the broad type of order that Verizon received—an order that appears to have required them to hand over millions of users’ call records. We were very surprised to learn that such broad orders exist. Any suggestion that Google is disclosing information about our users’ Internet activity on such a scale is completely false."

David Drummond - "Now, what does happen is that we get specific requests from the government for user data. We review each of those requests and push back when the request is overly broad or doesn't follow the correct process. There is no free-for-all, no direct access, no indirect access, no back door, no drop box."

The slides and accompanying commentary from the WP imply that these statements above are at best misleading and misdirection, but not necessarily untrue in a strict sense. There are various qualifiers and ambiguities in the Google statements which mean they could still be claimed to be true - the placement of the apostrophe on users’ data, which could be taken to mean all users as a plurality rather than just a few tens of thousand, the use of broad, and on such a scale to limit the denial to activities similar to those at Verizon which was reporting all activity. They may well not have heard of a PRISM program as there would be no reason to share the codename with them. Taken together those denials could be taken to be simply denials of participating in complete surveillance (with broad being defined as every single user) or giving access (in some limited sense) to their servers - I'm not sure they've ever denied access to data. The only thing which does puzzle me is that they've claimed their legal team reviews each and every request - that would be hard to do in an automated system or one in which the NSA has their own equipment, though perhaps they do it in bulk or retrospectively.

So these statements could be true in some limited sense, but it'd be nice if Google didn't feel the need to couch their denials in lawyerly evasions. The main reason they have to do this and cannot release more data is that they're not allowed to talk about these secret programs - that enforced secrecy is the most damaging thing here, both for Google and for public debate - we can't talk about them because they're secret, and neither the people affected, nor even the US Congress are given the facts to decide whether they even approve of this behaviour by the NSA/FBI, because the programs are secret. No-one can have a meaningful debate on these programs without more information.