There's an article in Eurosport in which Frédéric Grappe (head of performance at FDJ) says watts per kilo cannot be used as evidence of doping (because of variables & improved equipment since the 1990's) but the delta (actual seconds per km gains & average speed versus the rest) is a problem, i.e. according to him, if one of his riders did what Vingegaard did in the ITT, he'd be "ill at ease" & would ask serious questions:
https://www.eurosport.fr/cyclisme/t...-de-dopage-en-question_sto9715289/story.shtml
He says the margin of victory goes beyond the margin of error of power calculations. There's also this:
He has a lot of respect for Mathieu Heijboer but Jumbo need to do their own analysis of Vingegaard's performance (& whether he beat his own record by 10%) because it's just not possible to gain 10% in a Grand Tour.