> given proper environment.

I think a lot of languages will give a pleasant experience in a proper environment. The question then becomes, does a strict language like Haskell require less of a 'proper' environment?

That would be interesting to research -- though the amount of variables (team member's experience, team culture & hierarchy, company culture, financial interests, deadlines, project size, software development process, etc. etc.) would probably be hard to account for. All of them can have a very big impact on how software gets written.