No, I had not previously heard of the Arrowsmith Program, but it concerns me that a review of their own research citations does not include any peer-reviewed journal articles, with the closest thing to peer-reviewed research consisting of two poster presentations and a doctoral dissertation. The schools have been running since the late '90s, and would be expected to have accumulated at least one respectable journal article in two decades.
I have mentioned elsewhere that the conventional institutional research on brain training has been marginally supportive (though appealing enough that Pearson, the educational publishing monolith, has thrown its marketing heft behind a particular product).
