I think another thing to remember here is sampling bias. The actual conversion/deconversion probably mostly is the end point of a lengthy intellectual process. People far along that process probably aren't very representative of people not going through it and it would be much more interesting what gets the process started.

To add some more anecdata, my reaction to that style of argumentation was almost diametrically opposed. I suspect this is fairly common on both sides of the divide, but not being convinced by some specific argument just isn't such a catchy story, so you would hear it less.