I don't really agree that you can go from "Hey, I've got this great idea!" to a spec in 7 minute and 30 seconds for most features; for many of our user stories we debated for hours. This, of course, might just be a sign that we chose vague user stories.
Even so, importance of project management cannot be overstated. Even if planning takes up most of the effort per iteration -- presuming that it's good planning -- there's SO MUCH of value that will come out in the planning process that you can't get if you just sit down and hack it out. Maintainability is just one thing that good PM will get you.
Even so, importance of project management cannot be overstated. Even if planning takes up most of the effort per iteration -- presuming that it's good planning -- there's SO MUCH of value that will come out in the planning process that you can't get if you just sit down and hack it out. Maintainability is just one thing that good PM will get you.