OP, for the record, I believe that comment in the 9 link was by Marilee Jones, who left in 2007. (There’s an article which references her saying it.) The link is to the old site. I don’t see anything recent that limits the definition. The older links to the quote in CC now lead to this: http://mitadmissions.org/apply/process/match
If you’e aiming for an elite, ime, the background question is how engaged in and formed by the family culture, and any related present issues, is this applicant? Ie, the context for your achievements, your sense of identity, the challenges you took on and your triumphs. Mark Hispanic/Argentinian and they will see that, in their review of your match. How you present is up to you.