Maybe it's just that we hear about them on EWTN though . . .
I think it's partly that, and also the fact that a greater Catholic emphasis on apologetics has exposed Protestants to knowledge of Catholicism (and Eastern Orthodoxy) that they might not have encountered in the past.
There's also simply the ease of finding information - a person with a question about Catholicism, or wanting to read the Church Fathers (Greek or Latin) just needs a computer.