De acordo com essa materia da The Next Web, ela terminou a graduação sim. O que ela largou foi o mestrado:

http://thenextweb.com/la/2011/12/10/meet-isabel-this-23-year-old-entrepreneur-dropped-google-and-mit-for-lemon/

“After her MIT bachelor’s, she opted for a professional master’s degree that the institution runs in partnership with private companies.”