Seriously, what is it with YA readers? Is it a prerequisite to be unable to understand how rating systems work? Has someone swapped your cocktail of Ritalin and Prozac for a Stephenie Meyer-flavoured drain cleaner Mojito? You rate a book once you have read it when you then have the opportunity to evaluate it. Once you have read the book you have the right to give it any damn rating you please because you have earned it. It's idiotic to give a book 5 stars before you've read it simply because it gets you all gooey. See a doctor, apparently premature evaluation is treatable.