It takes all kinds. Without things like this, there would be less interest in some of the new stuff, and more might fail to be investigated further. And "improvement" in a brain is a pretty difficult thing to measure; at the most objective, you can do an FMRI and check overall bloodflow, but that's not conclusive either.
I would really like them to have more concrete information more often though, I wholly agree there. It'd go a long way towards capturing people who are more skeptical :)