Very interesting discussion. I'm not sure what DNA tests folks took to determine % of ethnicity, but I took an mtDNA test and found a link to Norway, Finland, Sweden and Russia based on the haplogroup only. However, this is consistent with my mother's mother's side of the family coming from Lithiuania (once a part of Russia). Most of my matches are live in general area described.
My father's side is definitely German and English. I wouldn't know where to begin trying to correlate YDNA and mtDNA results. I don't know enough about DNA to know what the best tests might be (on a budget)