...cool beans Craigo!
...as CHfathers's citation(s) demonstrates, don't be leery of older studies(not that i doubt you!). i distinctly recall discussions and papers demonstrating higher incidence among clusterheads of OCD, smoking, alcohol abuse, and mental health issues, etc...and i'm talking 20+ yrs ago.
..will certainly take this test but just by subhead alone, i know i'll score off the board