He conducted a survey and posted his results. Him being a Dr and from Harvard gives him a ton more credit than you, that's for damn sure. Maybe you don't like the results so you'll just find any excuse to try and discredit the whole thing.

So with that logic, we can easily discredit any religion and/or god. Just find one thing that they state as fact and all we have to do is not like it.

Who the fuck is Moses? Just because he chisled some stones we are to take that as fact?

Basically what it boils down to is the same age old arguement, taking faith and unproven facts as the way things are and not believing things even when they are layed out right in front of you.