I wonder if there can be a difference in the degree of pacing via chapter-ending hooks. Ex. if you have chapter hooks like "Who is this mysterious person?", does that read differently from something like "OMG, he's about to get shot in the face!"? And if you have a whole series of the former kind of chapter endings in one area of the book, would it feel slightly looser or less urgent than a series of the latter kind?

My guess from the gut is that it's best to use both kinds and intercut them to vary it up. Except maybe as the book approaches its ending; then I'm thinking it might generally be better to have the shot-in-the-face kind of chapter hooks, one after another, bam-bam-bam. Hmm. If that's true, that means that there is a difference in the degree of pacing.

And that would probably mean I need to keep an eye on the middle of my WIP and make sure I don't go on too long with the "Who is this mysterious person?" types of hooks. Which tells me something about how I need arrange some of these scenes.