
The book suggests that people in organizations self-assemble into tribes, ignoring the org chart, exactly as you note.
Tribes are one of the oldest organizational structures, the author suggests. He goes on to give advice about how to use this to improve organizations without getting crucified in the process.
I found the book interesting and worth my time.
http://books.google.com/books/about/Great_Boss_Dead_Boss.htm...
The book, written in a Socratic style, is about tribes and tribal behavior in businesses.
