Perhaps a minor credibility problem

Richard Dawkins has a new book coming out, titled The Greatest Show on Earth, in which he tries to win over fence-sitters with a case for evolution.

But, is it just me, or did his last book The God Delusion (as in, if you believe in God you’re delusional) maybe alienate some of his potential audience? Or is there a big market segment of creationist atheists that I don’t know about?