"These effects make sense: the core of mindfulness is the ability to pay attention. That’s exactly what Holmes does when he taps together the tips of his fingers, or exhales a fine cloud of smoke. He is centering his attention on a single element. And somehow, despite the seeming pause in activity, he emerges, time and time again, far ahead of his energetic colleagues."
I'm not sure I trust scientific conclusions drawn from the behavior of a fictional character.