I found an interesting article that details the numbers of how spoken word podcasts are showing gains in listenership across all demographics. The other contender, of course, is music. The numbers are still roughly 75/25 in favor of music, but more people it seems are want to gain information through the spoken word.
That is good news. There's still more progress to be made, but at least the gains are still coming. I keep changing up which pods I subscribe to as I change my current interests, but that speaks to how many options we have.