No it is not a Win for Black America, because that should not be a concern for us. No matter the shade of color our people are, we are still getting mistreated based on our race. I have light and dark skinned people in my family, and while colorism is a thing, it in the end does not change the fact that the overall society still considers Black the race as lesser and reinforces it with actions that harm us.
So becoming lighter over all is not a win for us, actually rising above the machinations of our oppressors is what would be a win for our people. Also, if you look at Brazil, you will see racism still exists there. Black people are still at the bottom, no matter the shade they possess. So it behooves us to focus on what is important, and that is not the shade we possess as a Black person.