I have no idea what that is. I think the author was saying that many people read something like this until they get to a part where they nod their head up and down, and quit reading. Hence the Rorschach reference. We are all like that. As we can readily see, some more than others.
OK, a little fun:
A mom and dad were concerned that their teenage son spent all his time thinking about girls. They took him to a Psychiatrist, who gave the teen the Rorschach test. The Psychiatrist shows the kid the first ink blob and asks, What do you see? The kid says, A naked chick!! Another blob, same thing. Six blobs, kid excitedly sees six naked girls. The Psychiatrist is frustrated, wads all the ink blots up and throws them in the wastecan. The kid shouts, Hey are you throwing those away? Can I have them? Rorschach baby.