I don't know anything about his "meditation," but techniques to calm you down aren't anything new.  I would just disagree that he should call it "meditation," because of all the spiritual connotations that word has.

Having said that, I have personally found Dr. Weil's advice on diet to be very practical and helpful.

Have you seen "Supersize Me?"  I just saw it a few days ago.  Amazing, and frightening.

Joe Mcex-premie