[DrNefario]

I'm kind of amazed at The Goldfinch's score, especially compared to Catching Fire, which I found to be a remarkably easy read (and which is the only one in that image I have read or attempted to read.)

I don't follow links to the Daily Mail, so I don't know what they're claiming about that.

Edit: OK, I read the methodology from the other two links, and it's pretty badly flawed. A score of 50% means the popular highlights are evenly spread throughout the book. Or that they are all from the middle. Low scores are probably more significant than high scores. I strongly suspect it has more to do with book industry PR than anything else.