From what I understand, they are first year prototypes with a new tubing (953 I think), and have actually been changing the frames during the season as they received feedback. I'm hoping this means that the complaints about stiffness or lack of are now being addressed and the next generation of these bikes will be better.
The point I was making though was that they are being used in team racing now, not just historically.
Absolutely, and many are watching the progress with interest.