As far as "new" is concerned, XP isn't new. It's a collection of practices that have been around for ages. Like the language SmallTalk, it's just things that have often been overlooked.

As far as "improved" is concerned, we've been doing this for over 3 years now and constantly improving on what we do. What we do today isn't what we did 3 years ago and all things, including this floorplan, change. The difference is that our organization, all the way down to this floorplan is built to facilitate change.