At least for Muslims, there is an obvious flaw since Islam forbids dating. So people that self-identified as "very serious" are pretty much by-definition not that. And since it is, among all the practices of Muslims, one that is popularly known and probably even overemphasized (relative to other practices), a large population of those that self-identified as "somewhat serious" are probably guilty of being a bit generous with themselves.
At the end of the day, of course, correlation does not imply causation. If either religious people get their panties in a bunch and overly-defensive or irreligious people start gloating, both are simply demonstrating that their dogma is overriding their intelligence.
At the end of the day, of course, correlation does not imply causation. If either religious people get their panties in a bunch and overly-defensive or irreligious people start gloating, both are simply demonstrating that their dogma is overriding their intelligence.