Will you out the school?
Prep Schools and super selective colleges have a symbiotic relationship. It’s in their interests to have close ties, and they do. The Deerfield Head of College Advising can absolutely call any school with a 15% admit rate, and get his/hercall taken. A super selective school has an admissions department that’s a well oiled machine – which means they will have a rep that covers the Northeast, and one that covers prep schools.
Now, not every College has this. But a sub-15% admit rate school? They all do.
That said, I am certainly open to being corrected if I am wrong.