I'm surprised You haven't heard of it........Do you not think it strange a person looks for a wife with certain educational qualifications and undermines other educational qualifications !
just like girls look for men with certain educational qualifications.. its a bitter experience to be on the other side of the stick..
but it might be just used as a compatibility score.. remember, nothing wrong in looking for a girl with certain qualities and educational background that might help them understand each other's professional life and stress.