Penny Taylor scored a game high 30 points in Game 5, and went 18-for-18 from the line.
With Penny Taylor contributing with 14.8 points per game, Australia dominated early winning their first seven games, all by double digits.
Penny Taylor was named the Most Valuable Player of the tournament.
Penny Taylor was in foul trouble most of the night but still played 33 minutes and had 16 points and 14 rebounds for the Mercury.
Penny Taylor scored 30 points and Diana Taurasi had 17 for the Mercury.
Jackson was one of three 19-year-old Australians chosen in the first round, along with forward Penny Taylor and guard Kristen Veal.
Into the void stepped forward Penny Taylor, who scored 15 of her team-high 20 points in the second half and shot 4 of 5 from 3-point range.
It rode the hot hands of forwards Penny Taylor (16 points) and Lauren Jackson (14 points) before the Americans' defense cooled them.
With ankle injuries to both Penny Taylor and Lauren Jackson, the Americans took the initiative and led 34-17.
This record would remain for 12 years until broken by Penny Taylor in season 2001/02 with 570 points.