I default to 2.3x plus silence skipping and I know people who go faster. Most conversational podcasts run effectively at 3x with the silence skipping. It sounds like gibberish for a second or two and then once the focus comes in it's normal. I can't listen to things are normal speed. I started out at 1.5 and then went up in .1 increments over time until it was too much. I still tune some faster speakers back to 2 or 1.1, but that is the minimum. I was always a piss-slow reader so I prefer to listen to things, but anything close to 1x just takes forever.