When my D visited Harvard spring of junior year, we sat in Agassiz Theater in the admissions building along with probably 100 other families. When we were flipping through the admissions brochure, we noticed that a girl from our high school (large public HS in suburbs in NE) who had graduated a few years earlier was one of the profiled students in the brochure. Obviously, we have no idea if Harvard tracked the progress of admitted students from our high school but we assumed that Harvard at least had a favorable impression of this particular student and hopefully of our high school in general. Fast forward 2 years later and my D was accepted SCEA and is now a freshman at Harvard.