on this topic of official rating of carbon bits--in 2010 I bought a cross bike essentially to replace my old tourer. This bike, a Spec Tricross, has a carbon fork and it was never clear to me, either by store employees or Spec themselves, of how much weight to put on the front fork--which has mid fork mounting holes for a front rack.
I didnt tour on it much with a front rack, but when I did, I continued my practice of not having much in the front bags, and I was aware of being more careful of this. I had a light front rack going back to about 1990, blackburn lowrider, and my front panniers were small and rather light themselves, so I never had much weight in them, certainly not compared to a later bike and later front rack and pannier setups on my tough Troll.

I have to admit though, it was always in the back of my mind how it wasnt clear of how many lbs the fork was rated for, and also I was more aware of how potentially loose rack bolts could really mess things up, and also that I was much more careful of going over rough stuff when loaded, just because of the unknowns of cf forks and front panniers--figured it was safer to be safe than sorry, easy to do mind you.