Yes, I edited that when I reread the article. The conclusion drawn from the article is that the 70+W is vibration of the bike that is damped (lost) in the ride

Yes, I edited that when I reread the article. The conclusion drawn from the article is that the 70+W is vibration of the bike that is damped (lost) in the rider's body. Adding suspension by running supple tires at lower pressure reduces the energy required to go over the rumble strips (https://www.renehersecycles.com/myth-16-higher-tire-pressure-is-faster/ https://www.renehersecycles.com/myth-16-higher-tire-pressure...). That one compares 26mm tires at 75 vs 95 psi, but there's a page somewhere that I think shows wider (think 42mm+ tires) at more like 25psi.