By the time Hersh first wrote about Abu Ghraib there had already been reporting on abuses by Amnesty International, and several days earlier some of the photos had been shown on 60 Minutes (as he mentions in the piece). The piece cites an Army report, credited to two named generals, and names seven suspects, six of whom were under active criminal prosecution. His report was published (and vetted!) by The New Yorker. The difference between that piece and this one in terms of sourcing and credibility is like night and day.