I remember that poll. Even there though, people could post their preference. In this one...all you have to do is watch the movies and hear how the name is pronounced, by those who know how. It doesn't really appear to be open to 'opinion', (though on second thought many seem to be getting it wrong anyway).

Incidentally....'cor-lay-oh-nay' is pretty much the way it's pronounced by Sen. Geary, when he's being sarcastic with Michael. So I'm not sure how that would make it the "...authentic, Italian pronounciation..." For that, just watch the scene where Vito returns to Italy to pay back Don Ciccio...

Apple