John, I still figure that this specific issue won't affect many touring bikes, as it's rare that cf forks are used, and it's an issue that is understood and dealt with.
In the end, I've toured with all three types of brakes discussed here, in mountainy terrain, and had a wonderful time on all trips, and stopping!
Well, it was a big enough deal that it was one of the reasons v-brakes were invented.
It is not simply an issue related to fork material or even to the fork. It's a somewhat complex mechanical positive feedback system that is impacted by cable length, fork characteristics, brake design/flex, pad material and it's interface to the rim, and bike geometry. Perhaps you're lucky to never have had the problem bit it's a fairly common problem with cantilevers.
J.