A carbon fork is under compression during the whole ride. It wasn't so much the fork that failed as it was the fork steerer. Complex components with multilayer materials (re: composite) has always been one that makes seasoned engineers nervous. Other parts of the bike aren't as troublesome but a fork that is asked to compress as well as torsional forces with a complex component is great, if it is engineered with a high level factor of safety (usually 7 but should be double that with composite materials). A finite element analysis on it with varying degrees would show that the slightest least material condition would create a faulty part.
My problem is most carbon, heck, all carbon fiber is being manufactured in a handful of factories in China where many quality systems may not be adhered to in order to meet quantity. Deming turned Japan around with statistical methods that made Japanese products the highly sought after production products associated with quality. China is now in the same situation however, their quality still is on the low end. Destructive physical analysis is done but you can't do that on all parts because you won't have any to sell.
In my welding science and metallurgy classes the profs said one thing in the beginning of both: rivets are the strongest bond over welding. Not the best or most practical but the strongest.
My post was just about preference. Strangely enough, my carbon fork on my cross bike was making an odd sound the last two rides, after this tragic accident, it is hung up until a new steel fork comes in. Why? My cross bike is ridden on trails that are difficult and includes rocks, logs, etc. I am also following the actions of several other people that I admire and have had the luck to train with, in that they have swapped out their carbon forks for metal. I think it's more of preference than fear mongering for me. Metal bikes still fail, but I really don't need to spend money on a lightweight bike when I can simply lose a few pounds (and need to!). Hey, if I get really good and am riding pro where I get a new carbon bike for each race? Maybe.
Although, the initial intention of the first post was if you have a Cervelo with that fork, GET IT CHECKED PLEASE PLEASE PLEASE!!!!! Pass it on!!!!
The only way out is through...
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