Having read the two different versions of the FAQ, I also have to dispute your thesis here. On November 12, that FAQ page was probably getting more hits in an h

Having read the two different versions of the FAQ, I also have to dispute your thesis here. On November 12, that FAQ page was probably getting more hits in an hour than it had in its entire history up until then. Say you're in charge of communications, and due to the landing problems, the mission profile has just changed from best-case to medium-case. What's the point of a FAQ that's wrong? The question is "How long will the lander operate on the comet's nucleus?", not "How long did you originally promise the bureaucrats the lander would operate?" As the answers change, the FAQ page changes. The previous version of that page on the Internet archive doesn't mention the landing at all. So this isn't even a long standing promise. Probably they were making estimates and new guesses every few days as they got closer to the comet and learned more about it. The target mission duration probably depended on the location they landed, which wasn't decided until a few weeks ago. Anyway, the FAQ page is not the official mission planning document, and it's not meant to be a history of every change in the plan. It's a place to answer questions that the public and the press have about the current state of the mission.