It's implied but not stated that we're not in the mirror. CONSTANT VIGILANCE!
(I say as someone who is >98% sure that we're not in the mirror.)
EY could fairly express that frustration at unexpected and seemingly inconsistent reader reactions whether we're in the mirror or not. 111 was less believable than 110 to me, so I see where he's coming from there. But whether we're in the mirror is a question of what level the author is playing us at, and it's a separate thing from this. That comment isn't a Word of God about whether we're in the mirror. Those chapters were both written to signal that we were in the mirror. I don't know if that's a true hint or a deception, but EY can be surprised by the differential reactions regardless. That doesn't seem to be evidence either way.
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 112.
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.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: