Sometimes I wonder how many things we've "proven" because our studies aren't large enough to observe all the edge cases. I sometimes wish I could contact the researchers and volunteer myself as a counter-example.

I haven't hooked myself up to electrodes and measured nerve response, but as far as I can tell I don't subvocalise when I read. I can also turn off my internal monologue; I don't have to hear the words in my head as I read them though I typically do.