I think you inadvertently didn’t attach the detailed matriculation year by year data that Delbarton includes on the web site.
https://www.delbarton.org/academics/college-counseling
I would venture a guess that if you removed the school name off of any of the college lists for Pingry, Delbarton or NA for a given year you couldn’t guess the school. Reality is all three produce tremendous results just arrived at differently. In Delbarton’s case it’s achieved while beating everyone else at sports. That elicits some misconceptions and jealousy but doesn’t diminish the outcomes of their students.
Again not every school is for every kid but certainly Delbarton’s placement speaks for itself. Cheers