Dumbledore's an over-the-top kind of guy. I got the impression that he was being genuine in his comments re: Quirrell; see for example his initial confusion when he sees him in the mirror.
On the other hand, I'm now pretty sure that he knew Harry was a Riddle instance, or at least something similar, all along.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 116.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)