No; thanks! Can you remember instances of people he put in each cluster? I'd think Mozart would be a young master, and Beethoven an old genius.

I don't know that anybody gets better over time in literature, at least technically. I wonder whether there's any correlation between a novel's (rank order / total number of novels) and its status. An analysis would be muddied by the anecdotally-observed effect that the more critically acclaimed an author's novels are, the slower he writes them. (Seems to be cause-effect, since the long interval, or cessation of writing, usually comes after the critically acclaimed novel.)