I would not say that. When you are skimming, you actually skip parts of the text. Since an audible text is a constant stream of data, just skipping parts would make it incomprehensible
In speed reading, you can read sentences backwards and the brain will reorder them in real time. You can learn to decouple image (symbol/word) acquisition from comprehension. Step one om this path is to stop subvocalization, saying words out loud in your head.
It's the same difference between Sync (O_DIRECT) and Async disk writes.
