A recent article says that 40% of Chinese Y-chromosomes originated from 3 men in the late neolithic. This pattern, fantastic success for a particular paternal lineage, has been seen before, with the Golden Family (descendants of Genghis Khan) and the Qing dynasty. Something similar may well have happened with the big R1b and R1a lineages.
Did any historian predict this pattern? I can’t think of one, off the top of my head. Someone who went to bed with The Empire of the Steppes under his pillow, someone familiar with the continuing high status of the Golden Family in recent centuries, might have, perhaps.