He said he's always amazed at how many allusions go over his students' heads. Recently, one girl wouldn't answer and then gave the right answer and my dad said, "Don't hide your light under a bushel," and he got blank looks. Then someone started singing "This Little Light of Mine" and he said yes, that's exactly where it's from. (Technically they both come from Scripture.)
I said I was surprised, given that it's still such an Irish-Catholic town. Though as I said it, I was thinking about my residual stereotype that Protestants are much more into the text than Catholics. And indeed, he replied that it has been his experience that Protestants are much more engaged with the text, that Catholics have the Church as intercessor.
And when he was longterm subbing for a 10th grade English class doing A Tale of Two Cities, kids kept looking at him blankly when he would talk about religious allusions -- like the Resurrection! Now that is intense. And 10th grade is around the time that Catholics are supposed to get confirmed.