Answer

Indeed interesting. By the way, as far as I know, he is mistaken about the percentage of Nobel Prize winners. There are more Mizrahim than Ashkenazim, especially when you take into account the total number of Mizrahi Jews in the world, which is much smaller than the number of Ashkenazim.
I just found this here: https://he-il.facebook.com/hakeshet/posts/637202729631217/
But in the past I saw something more authoritative and systematic.