I don't listen to country music - I don't mind it, but it's not really my go-to choice. But this was the first season that I voted consistently for a singer on The Voice, and that singer was Craig (and also Anita, when she was still in play).
My elderly mother, for the first time in my memory, voted for a reality competition (for Craig) via phone, and had me explain to her how to vote online as well (which was... not fun, as Mom isn't exactly the most computer savvy person).
We're not country music fans, or swayed by exhortations to Jesus (we're Jewish), nor do either of us live in small towns in the South (I'm in Minneapolis, she is in Cleveland) we both just happened to think he was the best singer & performer on the show. To chalk up Craig's victory to "southern, country music block voting," is missing the point.