This is a false comparison. You need to compare the RC schools with other private schools -- the numbers would be very different.
I-can't-believe-I-read-all-this-crud placemarker.
It is not a false comparison. Of all the schools in the area, the private schools (to include Catholic schools) have far fewer students and far outshine the public schools academically. (And athletically, too, in most seasons....although my county school alma mater won the state last year. :>)
It's simply a fact.
You can give me a zillion reasons for why you think it is that way, but you cannot change the fact that it is that way.