Something I really like about this model of native vs immigrant, regardless of whether it's true or not, is that it isn't just about age. My church recently finished a series of sermons about understanding generations. At first I thought it was a great idea, but as we went on I found that there is no such thing as a generation. There are only distributions of ideas, "populations" as the video calls them.
My mom was born in Cuba at the time of the baby boom, so convention says she's a baby boomer. The truth is, she's an immigrant to the baby boom- the culture's ideas, icons, feelings, they were all second hand to her. My father fits the demographic to a tee: born of a soldier, two siblings, Beatles and BeeGees. He speaks of the time with an accent of "you had to be there" because he actually was there.
At the same time that digital natives are roaming about, there are hipsters and makers and YouTubers, each of them probably meeting a rigid criteria, but also defining a demographic which, at best, marginally overlaps with "Digital Native". They speak with accents of their own cultures, they have something that binds them that is so much bigger than their year of manufacture.