I only scroll to read very dense text, like technical docs - and those tend to have the kind of paragraphs that take pages to scroll past.
On the other hand I most often select text at the bottom of the page before hitting Space to advance the page. If you could place a line of highlight across the page before it starts spinning (or jumps) and fade it out gently after - that would definitely be of use.
Or you could think about splitting chubby paragraphs into predictably behaving chunks.
