How fast do you read? I can visualize just about anything I've ever seen. I can dream of new visual experiences I've never had. I can even rotate shapes in my head. But I dislike words and I read very slowly (only for English though, with programming I'm a speed reader of code). If you're the opposite of me, then I bet you're able to absorb intelligent high-quality information independent of experience very very quickly. I've heard that people like you make great scholars for that reason.
I read about three times as fast as other people. I'm still not better in absorbing the information, I also make errors and miss key points.
The difference is that a book is already in a format I don't need to convert (to images) anymore.
About the 3x: if I need to show someone something to read on a screen and need to wait to scroll to the next page, I just read it 3 times and scroll then, it normally fits a "normal" reading speed.
I read very fast (English and code, and my native language), and I have a very vivid visual (as well as auditory) imagination. Wonder what I traded off in this setup.