I think that comes at a cost too though Toast. They use a rostering system which can be interpreted as quite a bit more restrictive than the usual volunteer systems...
While they can always get a truck (or 2) out the door, it means the volunteers have to commit to staying in the area.
I know this works well for them, and they obviously don't have a problem with it, but I wouldn't want to have that in my brigade. I think one of the things I appreciate most about the CFS is that you don't have to go to a call out, if you're in the middle of something important, its your decision if you go, not someone else's, so its all that more satisfying...