In addition to winning more golds than the U.S., Norway — with a population of just 5 million — finished just two medals behind in the total with 26.
Ashley said the U.S. medal haul was lower partly because other countries are becoming more competitive in winter sports. He said the team would have liked to have won more medals, but called their performance excellent anyway.
If there is reason to be more optimistic heading toward the games in South Korea in 2018, team officials said it was the strong performance in new sports like ski and snowboard slopestyle and ski halfpipe.
But replicating that success in extreme sports in future Olympics will be difficult, said Steve Roush, the former chief of sport performance for the USOC.
"The rest of the world is catching up," he said.