@FreeDuck,
FreeDuck, Our children are now in their forties, and also three years apart in age. They both attended public schools; our older son graduated summa cum laude for his undergraduate degree and honors for his masters, and our younger son graduated cum laude for his undergraduate degree.
My wife graduated with honors from high school, nursing school, and college. I barely graduated from high school, and it took me six years to earn my BS degree with a major in Accounting.
I believe there are both good and bad schools in both parochial and public schools. What matters is what the student takes away from their education; not which college they graduate from. Performance is what counts after one begins to work; not which school they earned their degree.