Well, people read in different ways.
When I read, I often need to take a break to process what I've read if it was emotionally marking for me. That can mean stopping in the middle of a sentence at times, and going for a walk. That also happens when watching stuff, which is why sometimes I like cinema less because I need to do all the processing after the movie, so I don't talk to people for a while once it's over. Plus I don't get my guessing.
That's another thing... It depends on the book, but for some I'd rather not finish it for a while. I'm in the story, the universe until the book is over. So if I'm enjoying myself, I don't want to be over too soon.
For instance, the Harry Potter books I would read a chapter per day. Reading the chapter in itself was very fast, and then I had a whole day to think about it, figure out things from hints, etc. I feel I got much more from the books (starting at the 5th one) than if/when I read them all in one go. I guessed a LOAD of stuff for instance. It's really not the same guessing something before it happens for sure and noticing the hints of it on your second read when you already know it happens.
When I read, though, I usually like doing it for a while. I don't have much time anymore so I do it less if at all. But also, when I read it's rare that I'm reading only one book. Usually I have a bunch I read at the same time. It might average one per week but it's more four of them taking me a month, for instance. I like being able to just get my mind off something and into something else, and I get overwhelmed getting too much of one thing at once. I'm the same with games or shows, etc. I'd rather watch an episode each of 5 shows than 5 episodes of the same show back to back.
Same thing with my translations, I'd rather have several projects I work on at the same time and jump from one to the next than doing them one after another.
Anyway, in short, everyone reads in the way that works for them. I need to be in a place I feel safe and comfortable, some people can read in a moving place or just anywhere. I like reading several things some people like focusing on one. Whatever you do isn't wrong if it works for you.
EDIT: I took the test and got 250wpm speed with 100% comprehension, so that makes me a really efficient reader and double the average ewpm, which I'm pretty happy with.