Look at the vid embedded in the Cycling Tips story I've linked to. It suggests it's stronger than regular crabon when you put it under a monster truck wheel (standard engineering test).
I'm sure the honeycomb structure itself is mega strong, I think it was how it was connected to the rest of the frame was where they fell apart. Bear in mind this is only something I read on the Bikerumor comment section or something similar so could be completely fabricated.
Look at the vid embedded in the Cycling Tips story I've linked to. It suggests it's stronger than regular crabon when you put it under a monster truck wheel (standard engineering test).