There's people who listen to podcasts and spoken books at least at 1,5 speed (or even 2 or more). Its a preference for sure. For me it depends on the content, the language, even what I am (also) doing. Sometimes when I found a part very interesting or didn't understood it I tend to relisten that excerpt or episode.

With regards to your example on repetition this is spot on. The value of repetition is taught at schools. However I suppose you, ianai, are aware as well how e.g. people on phone (e.g. marketeers) mention your name to catch your attention.