I don't think that's a good criterion to judge her opinion by. After all, you can't know very many of the 6 billion people in the world. Ordinary people's opinions matter, just as yours does. You and I can love JKR's books, and she can dislike them. All I'm trying to say is that she DID point out the weakest points in JkRs writing style, many of which have greatly improved by book 5.