It maybe doesn't come naturally to most people to be able to take in information from speech at high speeds, but it is definitely possible to learn. I am blind, and use a screen reader. My screen reader's voice is many times faster than normal human speech. (I don't know exactly how much faster, but most people can't understand a word of it.) I also listen to non-fiction podcasts and books at 1.5-2x speed, although I almost always listen to fiction at normal speed unless the reader is painfully slow.