This is my issue also. I'm guilty of being a 2x'er, not because I believe I'll absorb more information faster, but because I find most narrators/podcast hosts tend to slow down their speech significantly when recording something for consumption. Be it because their reading speed is worse than their talking speed, or that they think they need to for effect like some 1940's Trans-Atlantic radio host, I find it painful to listen to most of the time.