Update: Discussion has moved on to a new thread.
The load more comments links are getting annoying (at least if you're not logged in), so it's time for a new Harry Potter and the Methods of Rationality discussion thread. We're also approaching the traditional 500-comment mark, but I think that hidden comments provide more appropriate joints to carve these threads at. So as of chapter 67, this is the place to share your thoughts about Eliezer Yudkowsky's Harry Potter fanfic.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six. The fanfiction.net author page is the central author-controlled HPMOR clearinghouse with links to the RSS feed, pdf version, TV Tropes pages, fan art, and more, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it's fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that "Eliezer said X is true" unless you use rot13.
Point 1 - it wasn't stylistically consistent with later chapters. When I wrote the original Chapter 1 I didn't realize that this story was going to be funny. The part where Harry bites a math teacher in the original Chapter 2 is the exact part where I realized this story was going to be funny.
Point 2 - I got tripped up by the differences between the published SF I knew and the expectations of fanfiction. If you saw a character talking like that in a published SF novel, you would know that he was an alien or genetically engineered or that the author meant you to know something was funny about him. In fanfiction they assume that it's either the author's conceit or, more probable yet, you're just a terrible author who can't write realistic eleven-year-olds. I thought it was so blatantly lampshaded that nobody could possibly mistake it for an accident, but no, fanfiction readers just don't think like that - they don't look for clues and they do assume lousy authors. So I made Harry's intellect slightly more subtle in the first chapter and let it dawn slightly more slowly.
I think that with the popularity of the fic, most people are making their way to it with recommendations that it is already good, so they will have a different reading strategy than somebody browsing for something worth reading.