The answer seems to be: "After September 11." At one point, indeed, Dawkins said that the next atheist slogan he would like to see on the side of a bus is: "Science flies you to the moon. Religion flies you into buildings." He got a cheer for that, as he did for most things, the atheists in the audience outnumbering the believers by a wide margin. That didn't surprise me. What did was their lack of courtesy. There was even the odd jeer when the Christians were speaking. I had assumed that part of the point of being an atheist was that you were tolerant of the views of others.