Yes, and the fact that the mitochondrial haplotype is similar to those of Europeans rather than to Middle Eastern peoples suggests that the maternal ancestors of Ashkenazi Jews were European rather than Middle Eastern.
Something more is needed than mitochondria, though. For about 900 years after the destruction of the Temple, the Gaonim kept up a lively correspondence with the Jews of the diaspora, dealing with a lot of marital issues. Their correspondence has survived and been printed, and are an important primary source of information of Jewish life in early-Mideival Europe and the Middle East. I’d like to see the mitochondria and hypotheses built thereon corroborated with some Gaonic correspondence frequently dealing with issues of conversion, which is a complicated, exacting process in Judaism.
It might well be that the shiksaik mitochondria of a few converts became wide spread due to the carriers’ underlying hotness, as per my previous post.
Yes. The implication given was that female converts married middle eastern background Jews. No evidence for that, which is what I was trying to point out.