I would think every tire mfg can make an equally flexible paper thin tire that will ace rolling resistance tests no matter where they are performed.
I didn’t care enough to read the article close enough to find out if he was running his Extralights for the tests. If he was then I would believe they roll fast. I’m not sure they are truly any faster in repairing a flat.
People talk real world, well real world is buying a tire that rolls fast enough with the least headaches. After the fighting over testing criteria is done, they go buy Gatorskins.
John