I have read that some deaf people (with no inner monologue) can read a lot faster than average (e.g. 800wpm). Confounding that hypothesis, I have also read tha

I have read that some deaf people (with no inner monologue) can read a lot faster than average (e.g. 800wpm). Confounding that hypothesis, I have also read that some blind people can listen to synthesised speech at similar very high speeds (at which point it no longer sounds like speech at all, but they've learned to decode it by building up gradually).