The cross-section of the species represented by social media discourse is very troubling, much as you pointed out, and would lead the most optimistic person to assume we are dying out.

Honestly, I don't really know all the ways people could interpret their experiences of reading or, more generally, thinking. I guess I experience something like a "voice" but it isn't something I would directly associate with the experience of "hearing" a voice.

Then again, I am also the kind of person who will talk to myself when thinking through something as I find that it forces me to serialize my thoughts, which makes the rough edges and incomplete fragments easier to notice. It is also why I can't understand technical environments which aren't surrounded by whiteboards. How do you visualize complex systems without additional storage space and how do you explain them without pictures?

Of course, many people will try to extrapolate bizarre patterns from these differences, in their desperate attempt to make prejudice into an accurate pseudo-science. We now view craniometry as a nonsensical basis for prejudice but we still seem to be searching for something we can use the same way. Nothing like humanity's perverse interest in being superior "by definition".

The curiosity is really only useful as a low-level distraction, I would think.