I've heard that there haven't been any screenings recently and all of the "bad screenings" came from July and were far overwhelmed by positive fans.
It's just an article to try and get people to read it- it's not exactly wrong, but it leaves out a few crucial facts.
I'm looking forward to HBP so much!!!!! I hope I like it better than OotP and PoA.
Just have to wait until July...