I don't know how widely the term is used, but, at least one Rag writer (Chuck Schoffner) uses it regularly - "big four" to refer to Drake, UNI, ISU and UI. Regretably, the sad state of our MBB and FB has allowed the MVC schools to be more than competitive with us in recent years. But, overall, does the general public really equate the four institutions? For this purpose, I'll accept equating the Big 12 and Big 10/11 institutions.