Jim Kwik explains that reading speed is limited by subvocalization, the internal voice speaking words, not by thinking speed. Most words are sight words you recognize instantly without pronouncing them. You can understand audio at 1.5x to 2x speed even though you can't speak that fast, proving your brain processes faster than your mouth.
Chapters
You could only read as fast as you could speak. That means your reading speed is limited to your talking speed, but not your thinking speed. A lot of people could listen to this show at 1.5 or 2x or audiobooks. They can understand it if they're trained to be able to do that. They just can't talk that fast. The question becomes, do you have to say all the words in order to understand what the words mean? And the truth is you don't. Just like the punctuation marks, the exclamation mark, question mark, the semicolon, the period. You don't say those things. They're symbols that have a meaning. You don't have to pronounce it. It's like when you're driving, you see a stop sign. Nobody says the word stop. You understand what it means, right? You don't say it to yourself. 95% of the words in that book are what they call sight words. They're words you've seen thousands of times, like a stop sign, and you don't have to pronounce it to understand it.