Now I have to chime in! It is my opinion that anyone born in Maine is a native. What else can they be called?
Anyone hearing my normal Maine accent would not question that I am a native. But the fact is, I was born in Brockton, MA two months early as my parents were passing through on their way home to Maine! I have lived in Maine ever since. I still consider myself a native but officially I guess I am not. Close enough for me!
Brian W.