The education behind CFB and knowing what to look for is great. But in reality being able to use the techniques correctly at a job is not something that comes along that often.
The other issue I've noticed it people not understanding the techniques properly, and causing issues. People have been passed as competent on the CFBT course, but there is no way I would ever want to be in a building with them.
All in all, its a valuable tool, but not the be all and end all of firefighting, no matter how much some people want it to be.