Drop Off in Insulation Post CERT?

A recent analysis by Knauf suggests that there could be a marked drop-off in insulation retrofit measures once CERT comes to an end. Of course, one response is to comment "Well they would say that, wouldn't they?" However, my gut feeling is that there is some truth in the matter. I just can't see uptake through the Green Deal being anything like CERT uptake. As for hard-to-treat properties..................