This book is featured on msn.com today.
After reading the excerpt from the article, I don't find it very realistic that these sorority girls would open up so freely to a stranger, let alone one from the media. Even if a member of the GLO had a drug problem or an eating disorder, she's not going to openly admit it to many of her sisters (if any!), let alone a stranger. And the girls who do know probably aren't going to run out an blab about it to anyone.
The more I hear about this book, and the more excerpts I read, I find it less and less credible or realistic.
But if she can live with herself for profiting from publishing and promoting falsehoods and trying to tear down something she doesn't understand, then that's her perogative. She just must have low ethical and moral standards.
ETA: I don't know if it's because it was "typed" into the web page, or if it's like that in the book, but there are a lot of type-o's in this thing. For example, I thought advisor was spelled with an "or" instead of an "er."