Does that actually work to eventually cure your subvocalisation? And how long does it take? And are you supposed to read entire books like this, without comprehending them, or should I re-read each chapter again?
I am currently re-reading Adler Mortimer's How to Read a Book, but, so far I only found one paragraph on the subject of speed which amounts to the above follow-the-finger strategy.
* Read more. I find myself subvocalizing more when reading about new topics and less with familiar topics. The more you read, the more recurring themes you find.
* Highlighting helps me gamify reading. I'm basically hunting for interesting sentences.
* Appreciate which books are meant to be read quickly (self-help books usually fall into this category) vs. those meant to be read slowly. Give yourself permission to read at the appropriate speed for the given content.
Another trick is to focus on a specific word. Some words I can recognize with the corner of my eyes, I could say. Which means you predict what comes after, and you skip over it and focus on the next word you don't recognize. You go back if what you're predicted don't make sense to what you're currently reading.
All of this is just for skimming. I don't read fiction to remember quotes and the likes, so I used it quite a lot there. I can read 2 or 3 books a day that way. While I can remember the majority of the story, I couldn't quote a single part of it.
For serious books, I read more carefully, and I revert to subvocalizing, but I'm often done with the sentence with my eyes (using my short term memory) before I even subvocalize the first three words. So it's not really a hindrance, although I have found myself needing to reread a specific part as I otfen speed read over it.
I dabbled with it, and it seemed promising, but I never really put in a serious effort to break the habit.