The brain wave change they are describing has not been seen before, as i read it. Good or bad, it shows that doing a physical AND mental components together has produced something new and unstudied. there are some studies done on meditation, visualizations, and breath control too, and i must assume they haven't plotted the same feature there. I know there are also some papers coming out now showing some faults in MRI software and analysis that may undermine some of the results from those studies , but these are EEGs, so prob not as much an issue.

The tCDS paper seems to say you can choose either memory optimization , or flexibility and focus in thinking, but you won't get both....