Thing is, Catcher is my favorite book and usually whenever I mention it to someone, they get all animated and say, "I HATE that book!" I ask them why and they can never, ever give details to support their opinion. They usually say, "I read it in high school, all I remember is how much I hated it". I'm in my 30's and all my friends are 30's/40's. Which means people cling to their hatred of this book, for a reason they can't even remember, for literal decades.

In the rare case I actually meet someone who is familiar with the book, they like it. But yes, your comment about just mentioning the book to people can be a good indication of what they're like as a reader.