Once rode carbon Giants, Lotto-Domo rode carbon Merckx, the Posties were on carbon Treks, I assume there were other teams riding carbon bikes also during this season. The bikes last fine, they will outlast the rider. If they are good enough for the Pro's they will be good enough for everyone else. Buy one, ride it and enjoy it!
I have a carbon Giant from 96' and it still rides like new, I also have a 03 carbon Giant that I have raced all year and that is also excellent and will last forever. They are strong bikes.
CHEERS.
Mark