Some Lutherans retain Luther’s Marian beliefs, some don’t.
I’m not certain LUTHER retained ‘Luther’s Marian beliefs’...
“While Luther could call Mary the “Mother of God,” he was far more concerned to say something about the work of God in Christ than about her, thus, he un-deified her by definition. His usage was not intended to be a quasi-divine statement of veneration similar to medieval or current Roman Catholic trends. When Luther abandoned aspects of Mariology like the Immaculate Conception, it served to further un-deify the goddess. Christ was the only one conceived sinless ruling the throne of the heart, the only Savior in whom one could place their complete trust. While retaining such beliefs like perpetual virginity, Luther did so in un-dogmatic terms, making sure that Mary was not to be deified for such an attribute. He implied in the Table Talk that it was Mary’s choice to remain a virgin after the birth of Christ, rather than her continued virginity being a miraculous gift from God.”
For the Catholics on this thread, I understand the whole “Mary is not a deity” idea. This article is written from the perspective of Luther, and would need to be evaluated in light of the common practices of the 1500s.
FWIW - the full article is posted here: http://www.ntrmin.org/Luthers%20Theology%20of%20Mary.htm
Do you have a source for that statement? I think we can agree that 'traditional Lutherans' would exclude ELCA. Of course in general, 'Christian' might exclude ELCA on their current path.
Traditional Lutherans in the true sense of the word would mean LCMS and WELS. I believe in this respect, you are in error.