"And also with you" to "peace be with you" I've got fairly used to these days, and isn't just Catholic, so I coped with that and the Amens. Though they're harder to spot without a crib sheet. But I didn't know the Hail Mary or the Allelujah and the responses to Becky's prayer asking for blessings caught me out too.

"too Catholic" would be a daft thing to call it though, since it was in a Catholic church. Just because it's unfamiliar doesn't make it bad.