(CNN) -- What has Jay Leno done lately for NBC in late night? Well, even the network's official Wednesday announcement of his ouster (in spring 2014) acknowledges that "The Tonight Show" under Leno's reign continues to rank No. 1 in both total viewers and advertiser-prized 18-to-49-year-olds. That's against ABC's recently relocated "Jimmy Kimmel Live!" as well as CBS' longstanding "Late Show with David Letterman," according to Nielsen Media Research. Nonetheless, NBC will be pushing him out for a second time, with "Late Night" host Jimmy Fallon taking over "in conjunction" with the network's coverage of next year's Winter Olympic Games from Sochi, Russia (scheduled to run from February 7-23).
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Ed Bark: Jay Leno still No. 1 in late night for NBC, but network replacing him with Jimmy Fallon
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He says NBC says it's Fallon's time, and that may have much to do with social media
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He says Fallon, O'Brien can deliver Twitter, other followers that Leno, Letterman can't
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Bark: Network making it clear that's important. But can it turn social media sway into money?
But Leno, via the official @placeholder site, has just 525,000 followers.