There was so much info flowing from Nat, that a lot of it didn't get on tape. One thing that came out was the fairly recent useage by Dynastar of some different types of glass and different layups that allow for thinner ski profiles. This is very evident on the Sultan 85 for instance.
One thing is for sure (at least IMO) is that the Springblade build really works. One of the best womens skis that I skied at Alpine was a new model using this construction.