The group - led by Tina Charles and Lindsay Whalen - pressured Australia into turnovers and bad shots, helping the United States reach the title game yet again.
"We came out in the second half and once we got control of the game, it took off from there," Auriemma said. "It just illustrates it's only one night. If you have a great night and the U.S. has a poor shooting night or defensive night there goes the tournament."
Australia didn't have a great night, but the Aussies had a great half. Behind the inside play of 6-8 Liz Cambage, the Australians shot 61 percent and led 47-43 at halftime. But with a chance at another gold medal on the line, an inspired U.S. squad regained the lead behind the play of the reserves, harrassing Australia into just 4-for-18 shooting from the field in the third quarter.
The Americans will play undefeated France, an 81-64 winner over Russia, for the title. It will be the first time since 1996 that the Americans won't be facing Australia for the gold.
"We knew before that to win the gold you have to beat Australia whether it's in the semifinal or the finals," Auriemma said.
Australia went right at the U.S. with Cambage leading the way, but the Americans' depth and pressure defense were the difference again.
The Australian's budding star scored 19 points in the first half, she was scoreless in the second half.
Sue Bird said stopping Cambage was the first of many things the Americans talked about during the break.
"Not letting her get deep," Bird said was the priority. The U.S point guard added that the strategy was to jam Cambage when she was running the floor and prevent her from getting low-post position.
"She is a big girl, when she gets you sealed on her back that low, what are you going to do?" Bird said. "It's almost impossible to stop her."
And the U.S. rarely did in the first half. The second half was a different story for Cambage.
"They shut us down" in the third, Cambage said. "I know I backed down in the third. I put a lot on me."
Bird said the U.S. turned the game around with its depth.
"They're not rookies," Bird said of her first-time Olympic teammates. "These aren't 21-year-old kids who have never played international basketball. Once again, that is where our advantage lies."
The Americans had cruised through their first six games winning by an average of 38 points before facing the No. 2 team in the world in the semifinals.
The Americans have won the last four golds and 40 consecutive Olympic contests dating back to the bronze-medal game in 1992.
"I guess it is a little weird," Taurasi said of meeting Australia before the gold was at stake. "We've done a good job of taking everything in stride. We treat each game like a gold medal game."