I was just on the phone with a guy who we can never get the cadence right. One of us is always going on while the other can't wait to end the conversation.
We take turns in each roll so it isn't one person who won't shut up. I think it has more to do with both of us being thorough answerers and both being like "I got it I'm bored" as soon as they have enough detail to solve our problem. So the asker is always bored at the end.