I've heard some rebuttal on Blue Zones. In such days, it's hard to dig the truth. If you want to do true research, then you probably have to spend time reading and analyzing the "analyzed" data & statistics.
Then comes on reporting. If I, you or someone states "findings" of the finding, then questions comes back on your credibility. So, in the end the best way to experience it and verify if you can, in such cases the places and the community itself.
What's your opinion? Have you heard about such latest news? Is there a political agenda?