Nope, I'm not buying it. Even if what they say is true, then they are selecting what people read. That means they might be hand-picking exactly which comments they want, choosing those that are pro-Sony, rather than those that contain negativity. Essentially, this would almost be the same thing.
However, until someone else actually sees my comments on the site, I will believe that they posted that particular comment as part of a cover up. Why would they randomly post one thing at 3:30 AM whatever time zone they are in, when there are at least two other comments out there waiting to be posted about that story? I still say something is fishier than SOny would like us to know, and I think they really are blocking almost all of the comments on the site, at least, if not only posting their own comments, including some false answers to create a false truth about the site.