“Not so much. Designing effective training is hard. Really hard. Some experts go so far as to say that 90 percent of training doesn’t cause a sustained improvement in performance or change in behavior because it’s neither well designed nor well delivered.72 It’s almost impossibly difficult to take an average performer and through training turn them into a superstar. Some may argue that it is nevertheless possible, which is true (and I’ll tell you our approach in chapter 9). There are examples of people who were mediocre performers and went on to greatness, though most of those successes are a result of changing the context and type of work, rather than a benefit of training.”