UPDATE, 1:42 PM: With Wednesday’s final numbers in, the XXX Summer Olympics (17.9/30) continue their dominance of television and past Games. NBC’s Wednesday 8-11:26 PM primetime coverage had more viewers than any other non-U.S. Summer Games since 1976. The London Games pulled in 30.8 million total viewers, up on the 27.7 million that watched the first Wednesday of the 2008 Beijing Games and 2.4 million more than the 28.4 million who watched the first Wednesday of the 2004 Athens Games. The first six-night average of the London Games is 19.3/32, which is also the highest for any non-U.S. Summer Games since Montreal in ’76. That six-night average is 10% higher than it was for the Beijing Games and 23% higher than it was for Athens.

PREVIOUSLY, 9:17 AM: Wednesday’s XXX Summer Olympics (9.7/28) had more competition between Michael Phelps and Ryan Lochte, volleyball and Tour de France winner Bradley Wiggins becoming the UK’s most decorated Olympian with seven medals. In fast nationals, NBC’s coverage from London was up 3% from the first Wednesday of the 2008 Beijing Olympics in the 8-11 PM slot. That number will change when the final numbers come in later this afternoon. Over the six nights, including the July 27 Opening Ceremony, of the London Olympics, the 2012 Games are beating the 2008 Beijing Games by 7% among Adults 18-40 and by 13& in terms of overall viewers. With numbers like that, NBC easily won Wednesday night among Adults 18-49 and with total viewers, pulling in an audience of 30.56 million. At 8 PM CBS’s Big Brother (1.9/6) was down 5%, equaling its lowest rating on any night the reality series is shown this summer. In a night of repeats everywhere else, ABC had a new Final Witness (0.8/2) at 10 PM. Witness was down 20% from last week. Otherwise ABC ran encores of The Middle (0.8/3), Suburgatory (0.7/2) and duel episodes of Modern Family at 9 PM (0.9/3) and 9:30 PM (1.0/3). Fox had a two-hour So You Think You Can Dance (0.7/2) repeat and CBS filled out its night with repeats of Criminal Minds (1.1/3) and CSI (0.8/2).

Related: NBC Scores Most-Watched Summer Olympics Opening Weekend Ever