By the same token, if the problem was the ad, this would happen for everyone who it was served to.
It's also possible (and quite likely) the the faulty ad wouldn't cause exactly the same problems on other websites, due to the way in which it'll interact with the page, the size of the viewport of the browser, etc.etc.
That's true, but the video and related article doesn't confirm this. All we know is that the guy couldn't scroll down on the page. There's no indication right now that the ad is actually at fault.
> Khoi Vinh is a graphic designer, blogger, and former Design Director for The New York Times, where he worked from January 2006 until July 2010.
With that technical and journalistic pedigree, I expect him to be able to explain the issue and investigative details
We do know for certain that the ad is at fault. We can see that the ad is what is flickering into blocking the text. We also know that the NYT doesn't have a flickering block on every page.