I'm wondering if anyone who isn't Greek (or doesn't want to be Greek), which really is a majority of people, would even care about this book or want to buy it.  I have the feeling that way more sorority women than independents are buying it and reading it.  
Also, I just half-watched her Today show interview, and she was saying something like, "one of the positive things about sororities is humor, because sororities are really funny."  That comment alone makes me discount anything else she has to say.