I'm a huge M.T. Anderson fan (though I confess, I have not yet found the time to tackle his newest installment of Octavian Nothing).
Here is a terrific article about him, and his belief that teens want to be challenged:
Tomes for Teens
M.T. Anderson Gives Young Adults What They Want: Complex Epic Tales They Can Get Lost In
By Bob Thompson
Washington Post Staff Writer
Saturday, November 29, 2008; Page C01
"It's insulting to believe that teens should have a different kind of book than an adult should... They know the world is complicated, and "they can tell when a book is simplifying life."