Once again, the creationists are tripping over themselves to tear down strawmen of their own ignorant making. Just for example, ontogeny does not recapitulate phylogeny in the Haeckle sense, therefore this study is meaningless. And, as they didn't use this newly discovered developmental pathway to produce feathers in an unrelated organism (the elephant?) they didn't discover a developmental pathway. Further, because they don't accept evolution, they don't accept that the evidence is consistent with evolution. (How's that for logic?) On and on they blather. If they could only hear themselves.
This article very neatly lays out evidence for a ontogenic pathway of modern feathers, elucidating the main gene players involved. Very nice work. And we already know that ontogeny recapitulates developmental pathways so this study has something important to say about the evolution of feathers. This work is concise, clean, and significant for evolution and development.