Personally, Ive always measured people on their individual merits. My girls background, education, upbringing etc couldnt be further from my own, but we get on fantastically.
By all means use such criteria as a 'qualifying out' excercise, but be aware you may be overlooking the perfect giel who just never had the chance to study for a degree.

'Acres of diamonds', my friend.
If you're unfamiliar with the story, look it up. Its a worthwhile read.