We hear this a lot and somehow feel it's true but there are no reliable metrics and little verifiable data so ultimately it's just talk.
Agreed, I'm getting kind of sick of these articles. It's like if the developer community here started posting fluff pieces about how you need to use the best programming languages and the most optimized frameworks. Maybe I'm out of step with the recruiting community but are there people who are sitting around going "let's round up some really mediocre candidates?"
There are a lot of people going "let's round up the cheapest candidates we can find".
Said cheap developers will eventually wind up costing the company more than they make back.