I've worked for some big corps in my day. When I was hired at my first one the recruiter told me they liked hiring people from UNL and smaller schools because those employees tended to stick around. I saw this first hand as several years later they hired a new manager from a big ten school out east who directed HR to start hiring Big 10 alum because their education was 'superior'. I never saw evidence of that and most of them left within 2 years. Big fail.