Incredible credentials would be 2400 SAT, 780-800 on 3 or more SAT IIsFewer than 300 members of class of 2008 worldwide scored 2400 on the new three-section SAT,
http://professionals.collegeboard.com/profdownload/sat_perce...
so that is a rarely encountered characteristic even in the applicant pools of Ivy League colleges. (Princeton's entering class of about 1,243 students is numerous enough to include all of those students, if they all apply to Princeton.)
http://talk.collegeconfidential.com/college-admissions/41382...
And not all of the 2400-scorers on the SAT Reasoning Test have the specified scores on the SAT Subject Tests. So I guess I wonder if slightly less incredible credentials would still be noteworthy.
SAT fee waivers
http://www.collegeboard.com/student/testing/sat/calenfees/fe...
or their ACT equivalent
http://www.actstudent.org/faq/answers/feewaiver.html
appear to be the usual way that colleges identify low-income students. The specified income level
http://www.collegeboard.com/prod_downloads/sat/counselors-gu...
for SAT fee waivers is meant to match the eligibility levels for some federal programs, but might imply somewhat more prosperity than "food stamps, free school lunches, 3 pairs of pants." For sure, anyone eligible for the fee waivers would be shocked by the LIST price of any Ivy League college.