Well, reading speed clearly isn't a constant across the population or even for one person. Some people read faster, and TFA article admits as much when it poin

Well, reading speed clearly isn't a constant across the population or even for one person. Some people read faster, and TFA article admits as much when it points towards experience. A few hours ago, at 5am, while checking two weeks worth of email, I was very very drowsy and unfocused and couldn't read fast at all. I went to bed, slept a few hours, and now, somewhat refreshed, I can keep in zone again and read at a good pace. Reading speed for me definitely isn't a constant. When I want to read faster still, I can make a focused effort to do so. Emphasis on focus. The faster advancing eye movement takes focus. As does trying to comprehend the larger amount of words or (short) sentences that the eye consumed in a pass. Properties of the text have an effect on success; "speed-reading" a math textbook would be a complete waste of time for me, because the comprehension part requires so much more time and effort than "seeing" and "reading" the words. Same goes often goes for code or highly technical texts. The layout has another effect. Back to the emphasis on focus. Give me the right font size, short lines, and likewise short paragraphs, and I can read much faster without stumbling. Yes, it is about eye movement, about anchors, about breaking the text into conveniently sized chunks that can be parallel processed. If comprehension for the given text is easy enough, then this can help speed up reading a lot. Still, it takes a bit of a focused effort, which I would call speed reading? I read the linked article pretty fast. And my speed slowed significantly as I got back here, with the long lines stretched to almost full width of my display. First I stumbled a few times, and that was a sign to slow down. It is fair to say there's a limit to how fast one can read without sacrificing comprehension, that's for sure. But you can totally make a focused effort to read faster.