If I were Harry, I would probably wait a bit until the emotional chaos (both inside Harry and inside McGonagall) lowers a bit before telling them "hrm, you know, I'm the one who killed the Death Eaters". If I were to even speak about it at all.
Harry seems to want to setup Hermoine as the hero. Taking responsibility for it doesn't help with that goal.
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 117.
Plans for next chapter release:
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.)