It has a sour tone to it, doesn’t it? J.K. Rowling thought so, too, and changed to something that suited the character better. Rowling has said that Hermione has a healthy dose of herself in there, as she was quite the know-it-all herself as a child. Hermione was originally going to have a younger sister, but Rowling never found the right moment to stick her into the books.
[More: 10 Things You Probably Didn’t Know About Harry Potter, by Stacy Conradt]