I think we typically already know how we are going to respond to the earlier section(s) of the other person's dialog, and this is why our response is ready so quickly. If your counterpart speaks 3 sentences, I suspect that in many cases, your response really only takes into account their first and maybe the second sentence. Their third sentence likely often adds extraneous details that don't require you to adjust your response. Or, in the case of debating (ie: your response is a rebuttal in an argument), we often largely ignore what the other person has said and ramble off a response that doesn't even address the new information given to us by the other party. I find a lot of conversations to be more like two separate one-sided discussions where each person is selfishly just pushing their own talking points, rather than wrapping the other party entirely within the discussion.

Unfortunately, something about my wiring doesn't seem to match these timing cues up with my peers. In a group discussion involving three or more people, I'm desynchronized from the others. Far too often when I begin to speak, I get pre-emptively cut off by someone else who "beats me" to the cue. I think I take a little more time to plan what to say before I open my mouth, whereas my peers are ready to ramble unpolished responses the moment someone else stops speaking. Too many people just like to hear themselves talk and be the centre of attention the millisecond someone else's moment in the spotlight is finished.

>> a sign that we’re spending most of our “listening” time actually prepping what we are going to say (As Chuck Pahlaniuk once wrote, “The only reason why we ask other people how their weekend was is so we can tell them about our own weekend.”)

The article covers my beliefs with this quote, but then goes on to say this study proves otherwise. I guess I'm a pessimist.

Edit: As a side anecdote, I am 30 and have a much easier time hanging out with and speaking with 45+ year olds. Conversation flows naturally and my timing cues are much more in line, as opposed to the rush-to-be-first situation I run into with people my own age.