I've never felt the difference for books at least to be honest. As for shows, you'd be surprised, some actually get better the higher speed you watch them at, s

I've never felt the difference for books at least to be honest. As for shows, you'd be surprised, some actually get better the higher speed you watch them at, such as sitcoms with laugh tracks, where the higher speed means no pauses for the audience to then laugh, it feels more like a modern show.