O. B. E. is "outcome-skills based." It teaches "rhetoric" level skills without teaching the basic "grammar" and "logic" level skills. Here is an illustration:
Let's say we're going to teach you to play Beethoven's Moonlight Sonata on the piano by the O. B. E. method. We'll call this the "whole music" method. We'll sit you down at the piano and begin with the Moonlight Sonata. We'll tell you where to put your fingers, and we'll take you rotely through the piece. We may break the piece up into smaller and simpler portions at first, and we may introduce some "look-play" flash cards along the way. Eventually you will learn to play the Moonlight Sonata. It is likely you'll get your "certificate of mastery" for the Moonlight Sonata sooner than if we had taught you by the Trivium method.
What if you want to learn another song? That's where the difference in methods becomes noticeable. You'll have to come to us, and we'll have to teach you. We are the trainers, and you are the trainee. We are the masters, and you are the slave. You will be dependent upon us for everything you learn.
Of course there will be a few students who will "learn by ear" and who will "catch on" to the technique after a few songs. (Just as there are a few who figure out much of the English phonetic codes, and spelling and grammar rules on their own.) But most students will not figure it out on their own.
That is the Outcome Based Education method: You get good looking results faster, but they are shallow, and they don't last long. But most important of all, they create intellectual cripples who depend upon the educational system. Why? Because you never master the basics! You only master the outcomes! Creativity is tremendously stifled, because the student is never given the tools with which to create.