^^Preppy is a style of life, before it is a style of dress. But otherwise I would agree with everything Albion said.
I would put:
Middlesex
St Georges
Taft
StPauls
Deerfield
Hotchkiss
Groton
Episcopal, which has a distinction of being both preppy and southern
Exeter
But those top schools also strongly push diversity and take kids from every income bracket, even taking Indians and Chinese on scholarship programs, etc. I agree that preppy is a lifestyle, not a style of dress, which is why it's even harder to tell the true preps from neo-preps (the ones who dress preppy because it's in style).
