How Preppies Parse Language

From the film Metropolitan (1990) directed by Whit Stillman:

Interestingly, Averell Harriman did not make the prep pantheon in The Official Preppy Handbook, by Lisa Birnbach. However, she posthumously elevated him to the prep pantheon in her 2010 sequel, True Prep.  I wonder why he didn’t make the first cut.

W. Averell Harriman