"In my job, if you wait, you never get in"
Some readers work in rooms where the half-second doesn't exist. The meeting is a scramble, the turn goes to whoever's talking loudest, and anyone who waits for a finish is still waiting when the meeting ends. In that room, you'd say, the jump isn't a habit. It's how anyone gets a word in.
I'll concede the room. They exist, and they're miserable, and a person who's spent years in one has learned the jump as a survival skill. But look at what the skill buys you there. It gets your voice into the room. It doesn't get your point taken. Youngquist's listeners rated the interrupter as dominant, and a room full of people jumping on each other is a room in which every point arrives labelled as a bid for the floor. The points that get acted on in those rooms, in my experience, are the ones made by the person who somehow wasn't scrambling, and the reason they weren't is that they'd learned to take the turn at a finish.
There are finishes, even in a fast room. They're short and they're contested, but every speaker breathes, and every sentence drops. The technique is the one from chapter 23 for monologuists, and it works on a room. Wait for a drop. Use a name. "Can I come in on that, Mark." Then say the thing. That's not a jump. It's a turn taken at a finish, with a name on it, and it reads as someone who was listening and now has something. In a room of interrupters, that's rare enough to be noticed.
If there's a chair, use them. "I'd like to come in after Mark." A chair who's given that will usually give you the floor, and the floor from the chair is worth three floors seized.
And if the room truly has no finishes, if it's a wall of overlap from start to end, then the problem is the meeting and not your patience, and the fix is a word with whoever runs it, not a faster jump. A meeting where nobody reaches a finish is a meeting where nobody's tail gets heard, and the tails are where the objections live, and the objections come back at the door, as Marvel's patients' did, at a cost the meeting was supposed to avoid.
The pad matters most in these rooms. Three words in a fast meeting, and at the first drop you pick the one that's still worth it. You'll speak less often than the jumpers and be heard more, and after a few weeks you may find that one or two of them have started leaving you a gap, because it's become clear that you say something when you get one.