Oh my god -- a class of fifth graders in 2009 wasn't aware of two relevant scientific papers published in 2008?
The only way to explain these pre-teen children's ignorance of this knowledge is that there's a conspiracy dedicated to hiding the facts from them!
No, in practice eleven-year-old kids usually aren't reading the current scientific literature -- they're learning from their teachers and reading texts that have been written for students, and it's not surprising that it takes a few years for new information to permeate the educational system.
I understand the concern the piece is raising, but surely there are better examples than that, right?