Comes down to this: Shimano NA knows that a lot of US cyclists are still happily riding 9 speed groups, esp. Ultegra & Dura Ace. They know because people like me are constantly calling them trying to find things like front derailleurs and cranks and shifters, etc, because our regular distributors have no stock. They have no stock because Shimano Japan wants to devote as much manufacturing capacity as possible to the new 10 speed groups, rather than continue to make replacement parts for the 9 speed stuff. So far the home office is winning and there is no way I would point a customer toward buying something that the company who made it is trying to make go away.