MMY used hyperbole to promote his ideas, understanding that and your question will be answered. I think MMY even believed his own rhetoric, he made up TM (a good beginner program, don't get me wrong) but I don't think it came from Guru Dev.
I think MMY believed transcendental conscious could be obtained in a few years, whereas in practice most people won't even transcend fully ONCE in their lifetime! Hence his idea that TM would bring about all of Patanjali's 8 limbs of Yoga as a *result* of practice is poppy cock. He even let slip in his Gita translation (such as it is) that the eight limbs of Patanjali's Yoga were meant to be *means* to Yoga and not *ends* (read it for yourself in the appendix under Yoga).
