The Nielsen Company looked back at the four Stanley Cup Finals match-ups that have gone the full seven games since 2000 and in each case, Game 7 was a ratings windfall. For example, games one through six of the 2006 finals between Edmonton and Carolina averaged 2.4 million viewers. Game 7, however, more than doubled that figure with 5.3 million viewers.

In 2003, when the New Jersey Devils finished off the Anaheim Ducks, Game 7 was watched by 7.2 million U.S. viewers on ABC. Not only did the game attract 140% more viewers than the average of the previous six games, but it was also (and still is) the most-watched Stanley Cup Finals game since at least 1992.

The “Game 7″ effect isn’t just limited to the NHL. When Detroit and San Antonio took the NBA Finals to the limit in 2005, Game 7 was watched by 65% more viewers than the series average to date. And in the eight MLB World Series or LCS matchups to go the full seven games, since 2000, Game 7 viewership overshadowed the rest of the series’ averages each time by anywhere from 74% to 94%.

-The most-watched global event ever (2008 Beijing Summer Olympics: 4.7 billion viewers)

-The most-watched Super Bowl ever (Giants-Patriots, Super Bowl XLII: 97.5 million viewers)

-The most-watched cable broadcast of all time (Cowboys-Eagles, Monday Night Football: 18.6 million viewers)

-The most-watched cable golf event of all time (Tiger vs. Rocco, U.S. Open Playoff: 4.8 million viewers)

-The most-watched cable baseball game ever (Red Sox-Rays, ALCS Game 7: 13.4 million viewers)

-The most-watched NBA Finals in five years (Celtics-Lakers, NBA Championship Series average: 14.9 million viewers)

-The most-watched NHL regular season game in nine years; most-watched finals in five years (Winter Classic: 2.5 million viewers; Stanley Cup, Penguins–Red Wings average: 4.5 million viewers)

-The most-watched Wimbledon final in eight years (Federer-Nadal: 5.2 million viewers)

The surge in viewership could be attributed to the dramatic storylines behind these games and events, but Nielsen’s analysis shows that new technology is enhancing the sports fan’s experience:

-Ratings for sports events are 20% higher in homes with high-definition TV sets vs. total U.S.

-75 million people visited sports websites in October 2008

-11.6 million unique users logged more than 1.2 billion minutes on fantasy sports sites in 2008

-10.6 million U.S. mobile subscribers accessed sports content via the mobile Web in August 2008

View the full report.

Read coverage of Nielsen’s findings in USA Today.

Take our poll.