Occupational and Aptitude Assessment to Release the Potential of our most Vulnerable Students

Just been re-listening to Sir Ken Robinson's inspirational TED talks and once again the frustration of educational institutions difficulty in releasing potential takes hold.
http://www.ted.com/talks/sir_ken_robinson_bring_on_the_revolution.html
I would argue that our educational institutions are not broken but are having difficulty adapting to new possibilities. 
The outstanding school that I have worked for over the last 12 years is open to innovation and invited in Saville consultancy to trial their 'MY Self' psychometric careers guidance which identified strengths, weaknesses and strategies for developing both. 
This assessment took place on-line and we wont know if their assessment is particularly effective for sometime but I jumped at the chance to learn more and talked my Head into sending me on the BPS psychometric testing training course. As part of this training I received the whole package of assessment and I can say that it has had a profound effect on my career path, and in a very liberating way.
Our schools are not broken, they are alive and well with a stronger intake of young teachers than perhaps we have ever seen,... BUT we could be identifying aptitude (which are a world away from exam results!) and potential more effectively to motivate and inspire some of the students who need it the most, it could make the world of difference to them. It could also help out the odd middle manager or two!