Just read through the comments on Jim Hill's article, aside from one specific recurring comment, I couldn't help but chuckle at the silliness some of these people are blabbering about.
The one recurring comment I noticed is that teenagers want nothing to do with this movie. Based on what I've seen, that's unfortunately correct. With a big movie musical like this coming out, I notice every kid at my old high school puts every musical on a pedestal and unfairly compares it to Little Shop of Horrors and Grease (I'm 95% sure that if John Travolta played Gary this movie or Audrey II made a cameo would be doing double the business it has been for this very reason). And unless it's SpongeBob SquarePants, Pokemon or maybe Pixar on a good day, they will have nothing to do with anything animated. While it's not animation, it's easy to just classify The Muppets as being animated. So it's no wonder teenagers are so narrow-minded to avoid this movie.