Provo, Utah is a hotbed for startups despite being made up of at least 90% people who don't curse or drink beer. There's your counterexample.
What's with the "we"? Are you attempting to speak for developers as a whole?
Thing is, I've never met a great developer who gave a crap about a coworker's religion, political beliefs, whether they drink or not, etc. I've met plenty of mediocre ones who do.