[tortoise]

Those stats leave out one very important factor--how many atheists even bother to get married at all?

Lots. Back of the envelope, about 80% of the atheists I know (and being where I am, I know many) are married. However, less than half of those have children, though a few of those have several children.

As a general observation, their marriages seem to do pretty well actually, though most took at least a few years before getting married in the first place.

[A. Pole]

Back of the envelope, about 80% of the atheists I know (and being where I am, I know many) are married. However, less than half of those have children, though a few of those have several children.

This is my observation too. No children or one child.