According to The Association of Boarding Schools:

 

• 87% of boarding school graduates report being
very well prepared academically for college,
compared to 71% of private day and 39% of
public school alumni
• 78% of boarding school graduates say that they
were very well prepared for the non-academic
aspects of college life, such as independence, social
life, and time management, compared to 36% of
private day and 23% of public school students
• 41% of boarding school students say that their
college or university guidance counselor was very
helpful in exploring college options, compared to
23% of private school students and 13% of public
school students
• 50% of boarding school graduates earn advanced
degrees, compared to 36% of private day and 21%
of public school alumni