Okay, so I know this sounds like a funny comment, but as someone who has only recently really started reading long form comics and graphic novels I have realized there is a difference in how I need to read. I am a reasonably fast reader and I grew up devouring books. The text makes your imagination come alive and the suspenseful moments I would always read faster because I need to find out what happened. I have read some book series over the course of a couple days.
With comic books and graphic novels if I go to fast I tend to miss something because it is about more than the words. The combination of text and images means that there is a lot more that you have to look at to fully absorb the story.
Reading to Forget
The biggest thing that I discovered is that when reading a comic I can feel that I am actually understanding what is happening, but then when I think back on it I do not actually remembered what happened. Some of that seems to come from the fact that I was reading the text, but skimming over the graphics. If you are used to just reading the text and the images are non-essential it makes sense. In comics the text and images combine together to create the story.
If you skip over the images you miss half the story, which explains why I forget what is happening when I read to fast. To really absorb the story I feel like I need to take my time with it and really understand what the visuals are attempting to convey. In books we describe what is happening, in comics they show it. The only comparison I can think of is trying to fast forward a movie and still understand what is happening.
I do not know if anyone else has this issue, but it is definitely something that I had to figure out to make comics more enjoyable. There is a way you have to engage the medium that is very different than just reading. Now with short form comics that are single panel I can do that just fine, but when there is page turning involved for some reason I had to switch how my brain is thinking of it. When I figured that out it has made reading comics a lot easier, but it does take a different amount of time and frame of mind than reading a novel.