Deena, You had every right to post that very interesting quote! I got the same reaction on the Melungeon list when I posted the titles of some articles & books that I thought some people might find useful. I notice a lot of the same names here.
I have also noticed a tendency for every white Appalachian these days to claim that they have "a Cherokee greatgrandmother," or they're a "descendant of Charlemagne," or now the latest craze is to "discover" that you're Melungeon, and therefore Turkish, of all things! (Next, people will be tracing their lines back to Martian spores) But, when you start digging, you find mostly illiterate British paupers, who would've rather killed an Indian woman (maybe after raping her) than marry one. It IS very ironic. In doing my family tree, I've constantly run into "royalty" stories, which have all turned out to be based on poorly done 19th-century genealogies, which have found their way onto the internet.
My own theory on the "Cherokee" thing is that it may have first started when it became known that the US Gov't would be paying reparations to the SE "civilized" tribes, like the Cherokees, who were removed in the Trail of the Tears. After the 1960's, it became cool to be ethnic in some way, and a lot of white Americans wanted to identify with a supposedly more "environmentally conscious" group (see the recent book "The Ecological Indian" for a good treatment of this version of the "Noble Savage" archetype). The Cherokees also happen to be the most well-known southeastern tribe. Ironically, many white Americans may have some Indian ancestry, though more likely it would be Powhatan (Pamunkey, Rappahannock), or Monacan, Tutelo, Haliwa-Saponi - something like that. Or the dark skin of an ancestress may have come from West African genes.
I have Adkins on both sides, and just recently ran into a web page that showed a "1/2 Cherokee Adkins" as the 1st wife of Nathaniel Adkins of Pittsylvania Co VA & eastern KY (1 of my Adkins ancestors; another is William V., who m. Elizabeth Parker - there's a royalty story about the Parker line). So again, I find myself trying to track down the source of an "Indian grandmother" story...