As I understand it, they have frames from 953 that are ~1300g while the same size and geometry in CF is ~900g, that's getting awfully close, close enough that given the right choice of components you might possibly build a bike that overall is a lighter weight then the CF one. Given that these steels are as hard to work with as Ti, and priced like it too, it really doesn't matter to me. It's better for me to take 15kg off the engine, then 15g off the bike, and I don't have 5 digit bike budgets.