Seek, and ye shall find.
But your link doesn’t reveal anything less mature than comments about the books by people who haven’t read them.
Actually... That was on the front page of the website in the comments section... I’d expect an author/ web creator in his/ her late teens/ early twenties to be able to coherently articulate his/ her opinions about a book. I think that the comments and web postings give a better taste of the average HP fan.
As for the books, I’ve read all of them (the last two the weekend they came out). I’ve always like HP and found the Half Blood Prince to be very moving; however, I thought that the last book didn’t live up to the former ones. The ending was ridiculous... Additionally, the plot meandered quite a bit and there was too little Hogwarts for my taste.. There were also parts I liked... The Forest Again had me in tears, and some of the darker chapters (i.e. the ones in the Ministry) were really blood boiling...