Of course it's anecdotal. 

I cannot speak for my cousins -- most of whom I have never met, and I didn't get along very well with the one I did meet -- but neither of my two brothers is religious in the slightest. My twin brother went to a Catholic high school and a Catholic college, and is an atheist. My younger brother was rejected by the institutional Church because he is gay; and is vaguely spiritual in some rather nebulous way.

I have been urged by religious Jews to turn to their faith more than once. I am, after all, a Jew under  Halakha since my mother was a Jew. (I am also a Jew under the Nuremburg Laws.) But while I do find some things about Judaism fascinating, I am not attracted to either Orthodox Judaism or Conservative Judaism, and I don't really see the point of Reform Judaism. Perhaps I might be a Reconstructionist Jew, but almost certainly not.