Most people? No. Certain people? Absolutely.
One thing that occurred to me a decent while ago while I was rereading "The Tao of Jeet Kune Do" is that for a lot of the stuff in there, it helps to be Bruce Lee. The same goes for a many of the techniques out there. They work absolutely amazingly well if you put in the years of practice, but you won't get much out them "real world" after a 4-hour seminar.
A lot of people dog BMC because it's different, but I'm quite certain that the people who have put in the mileage for it's effective use, it's quite effective indeed.