Some eleven-year-olds might be that way, but if your sample consists mostly of relatives of geniuses, it's going to be pretty skewed, I would think.
There's no causal link between Harry and Draco and Hermione and Blaise and... I dunno who else people are claiming is unrealistic. Still, four unrelated genius-level children out of the, I don't know, one hundred first year Hogwarts students? It's not entirely unfair to see that as statistically unlikely, even if theoretically possible.
I don't get the impression that Draco is especially brilliant (for a real eleven year old, he would be, but Eliezer's characters don't act eleven in general,) but rather that he's especially well trained. He might be a one-in-a-hundred intellect, but he's had an education that not one muggle in millions gets.
Blaise is clever, but likewise learned from an exceptionally duplicitous mother, and had Dumbledore passing him notes.
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: