Yes, I think you are right. Im not a fan of the plastics used in my old B7 Rs4 and the S5 interior plastics look similar, I would certainly miss the leather covered dash and doors of the 997.
At the moment im not convinced about the looks of the RS5, I need to see it in the flesh as it looks a bit lame in the pictures. Daytonna grey and black optics would look nice.