I think this is silly. Carbon is no doubt stronger than alu or steel on paper and in tests like that, the problem lies elsewhere. If I had a bad crash on a steel frame, as long as it did not crack i would still ride it. If I had the same crash on a carbon frame I would be very worried as most damage would not be visible. Also a bad scrape can ruin carbon where steel or alu would be fine. Carbon is amazingly light and strong but I think it is better off kept to uses where it will not constantly be smashed into stuff.