When White et al talk about their cohort's 'disability'- it's in the above context, as 'mentally disabled' not physically. This is a key issue and their getting all protective and caring for their cohorts' 'disability' deflects attention away from the lack of physiological impairment that would be found say, in patients fulfilling the Canadian criteria!
Good point.
But they also have to deliver on the employment front. They have to justify the economics of this approach to disability. If they are not translating those (minor) subjective 'improvements' into substantial numbers of patients substantially increasing (and sustaining) their genuine paid work hours (ie being less dependent on welfare), then they and their model will not hold favour with the medical, political and economic establishment forever.