Right. The result for headlines of 65 chars - shared 50,000 more times than 60 chars or 70 chars - seems too incredible to occur at random and suggests instead

Right. The result for headlines of 65 chars - shared 50,000 more times than 60 chars or 70 chars - seems too incredible to occur at random and suggests instead that a popular news source has implemented a 65 chars policy. [Edited to note: Yep. YouTube is dominant as the popular publisher in this review, and truncates headlines at 66 chars - that's what this article observes]