There is a random element in any risk. I am sure you have seen guys at the Tour de France carrying bikes over the finish line after a crash where the carbon bike frame is in multiple pieces while others in the pile up are riding similar frames through the finish.
Unlike steel carbon can be designed to add or subtract strength in any orientation. Maybe I oversimplified by mentioning only wall thickness in my previous post. I know that weave orientation and method of manufacture also can play a part. The basic point I was attempting to make is that it is very difficult for the consumer to tell how the carbon frames were designed so I think trust in the design and manufacture is even more important with carbon than steel.
There are some knowledgeable carbon folks on this list and maybe they can add there opinions.
Last edited by waynesulak; 01-02-13 at 11:08 AM.