It's not a recent saturation, because all his scores in the history are TM scores.
But, he has earned a good share of credits - recent wins in tournaments or matches will effect the average, as match play wins against Ls and higher will, like the win against JK yesterday and against D a week ago. AFAIK, these two alone are good for a drop of 1.4 average strokes, and there has been a third match win against a Legend at some time.