Who cares how fast a guy can do such drills, etc.? Like the article states, the record holder isn't even an NBA player. If they want to get an assessment of someone's mental toughness, just WATCH THE GAME FOOTAGE and see how they react going down the stretch of a tight game or how they perform when their shot isn't falling. Watch their body language. Do they hang their head, or continue to compete and find a way to contribute without scoring, etc.? That should take precedent over how they perform during some run at the end of a workout, imo, but what do I know, lol?