Well, today I went down there, planning to visualize the new stem seals to see if they were different from the old ones. I had been told that the exhaust valves were backordered until 3/10, so I was going to just visit my dismantled bike as well. When I got there, the service manager told me the valves had already showed up, so he shipped them and the head off to the machine shop. He also said they expect the repaired head back by Friday, and then it's just a matter of reassembling the bike. I'm thinkin' it might be ready by Friday the 17th! Which would actually be somewhat bittersweet, since I can't ride Saturday anyway.
The service manager also told me that he had heard nothing about redesigned seals. He thought they changed the guide material. He also said that Yamaha isn't sharing much information about the issue, strangely quiet for some reason. Hmmm...