Recent results would dissuade anyone from getting carried away over what seems a breakthrough performance by a U.S. pair.
Such performances have happened off-and-on in the past few decades, but not since 2011 has a U.S. pair finished in the top six at the World Championships. And not since 1996 has a U.S. pair won a world medal in a non-Olympic year. (Post-Olympic fields at worlds generally are watered down by the absence of the new Olympic medalists.) And not since 2002 has a U.S. pair won a world medal in any year. And only once (2015) since 2007 has a U.