Not as of yet. All the details I got was that they went to a thinner face from the S56 to deliver more ball speed and that they added Tungsten to the toe area of the club head. By doing so, the balance point is being manipulated to be in the center of the club head. They will also have stronger lofts than that of the S56 irons. In the creation they were getting a higher ball flight thanks to weight movement and this new balance so they strengthened the lofts to bring the ball flight down as well as add tiny little "bars" they call Stability Bars to offset the higher flight.
I think they look pretty nice - I've never hit the S Series so I am curious as to how forgiving they are. Are they in the MP 53 range or more demanding? I would love a nice cast set I could keep forever. With my miss being off the toe I like the weighting out there.