This effect goes both ways; resourceful people should be wary of people who are hard to listen to. I feel like when I'm speaking to someone on the same wavelength about a specific topic it's quite easy to take shortcuts through a lot of the conversation with a simple nod and a word.

The opposite type of conversation feels like you're walking through a swamp with no end. You know exactly where they're going with their point many sentences before they reach it, however they continue to drag out the thought.