I'm not suggesting that some groups are more proactive than others - just offering a question that one could draw from that data. Put differently, what if Clojure developers were less annoyed by bugs than C++ developers? I see that conclusion as just as valid as those you've drawn.
I agree that static typing is not an excuse for tests (even though many folks in the FP community wold say otherwise...). Types can certainly eliminate a class of problems if used well, but they're certainly not a silver bullet. Tests guard against change. For any decently-sized project, you need tests to protect your code against yourself :).
"you need tests to protect your code against yourself" -> that made me laugh!
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