I prefer a fast model too, but you cannot get more done just because its faster. You just get to the human parts a bit faster. Code review, revision ect.
absolutely not ! it's not an "ohhh ill get 100x more coding done" it's definitely a preference/work style thing. I find it's hard to get in "the flow" when managing multiple agents, and if I just do one at a time with today's frontier models, I find myself waiting 10 minutes twiddling my thumbs while they do something all the time. Then needing to catch myself and turn back over to it when its done, all these micro switches between tasks is really difficult for me. If I had an instant agent I probably would be somewhat faster, but not zomg1000xunicornrockstar nonsense. I would be way happier though