Those times were run in Lausanne which is at 1600ft (500m) altitude. Everyone ran great times in Lausanne because of that. Instead of the times, look at who they beat and who they lost to, and by how much. Dafne was soundly beaten by Dina Asher Smith of Britain by more than a tenth of a second. She used to beat her regularly. Ta Lou also beat her by a tenth. Guliyev loss was worse. He lost to 2 Canadians (DeGrasse and Brown), an Ecuadorian (Quinonez), and of course Noah Lyles. Finishing 5th in a race with 1 American and no Caribbean sprinters is worrisome to me. In May, when he ran 19.99 in Doha, he beat Brown and Quinonez by 2 tenths of a second! Despite the time of 20.01 (-0.1w), he lost to sprinters he had beaten easily in the beginning of the season. So, to me, he's faded.