<p>I agree with both Looking and Philo. First there is no substitute for experience and the ability to know what works and what doesn’t with years of having done it. Secondly, I went back to grad school in my 40’s while working full time and found that I grasped the intellectual part of it as fast, if not faster than in my 20’s. Often times it is the personality and the refusal to think ‘outside the box’ that it the limiting factor, not age…</p>