Pretty great performance. The US has had some very, very good results in hot weather marathons that become tactical. I'm thinking of Athens in 2004 where Meb and Deena medaled, Rupp in 2016 (Joanie in 1984 ran very fast in very hot conditions), Seidel today, and I think Cragg as well at World's , Steve Spence in Tokyo in 1991, and Mark Plaatjes in 1993 (that was in Stuttgart, so maybe it was not hot)--our men haven't won a medal at World's in the marathon since then, but the women have a silver from Marianne Dickerson in Helsinki in 1983 and bronze from Amy Cragg in 2017 in London. In the Olympics, after the U.S. men won 7 early medals through 1924, they didn't win another until Shorter in 1972 in Munich and then the silver in 1976 in Montreal, plus Meb in 2004 and Rupp in 2016.
It seems that hot weather marathons raise U.S. chances of medalling by slowing the race down, whereas they lower U.S. track runners' chances of medalling.