They seem to be a bit "exclusive" at the moment, but not sure why. There are a lot of shops selling them around here but I don't see a lot of people actually riding them. My LBS sells them, the owner rides one, but I went in to the same shop and bought a Pinarello. They don't keep a lot of them actually in stock, in fact there was only one display model in the shop last time I was there. Every time I have been in the shop when another customer was taking delivery of a bike it was always some other brand. I have friend living in another country that ordered a C60 a few months ago, and the expected delivery for it is in February, so that might be one reason if indeed it is the factory's fault. I don't know many people with money burning a hole in their pocket that want to wait 3-4 months for that new bike.

All that being said, I've kinda noticed a waxing/waning pattern to their popularity over time anyway. They seem to sponsor a lot of teams(mostly in pro continental road, CX, and MTB), so I don't think they are in trouble but perhaps it is due to lack of demand for their bikes in the US?