You never can tell, tommorrow they might announce a link to pancreatic cancer.
Perhaps the Starbucks lobby has simply been rewarded.
An active brain is a better brain. Crainial stimulation with positive electrodes on the left posterier and negative on the right anterior lobes will produce profound improvement of certain tasks normally found only in experts.
To produce these "hats" for the public is easy and inexpensive. I will call them electro coffee hats. ECH for short.