This is kind of rough for technical or reference-ish books. Perfectly OK for fiction... well, except for anthologies and collections (HAL 9000 says I'm sorry Dave, I can't let you skip past the other Arthur C Clarke stories in this anthology, you'll have to read all the stories in order, at an acceptably slow speed)
I subscribe to F+SF and it would annoy me if I were technically prevented from skipping the end of stories that don't resonate with me.