There is no equivalency here. Fox pulled the story because they HAD to. There "source" backpedaled and from the article itself, "Law enforcement officials have said that Rich’s computer and email activity have been examined and suggest nothing that would connect him to WikiLeaks" The story was false.

OTOH, the WaPo and NYT articles have been panning out, not falling apart. Anonymous sources are only anonymous to the public. The journalists and editors know who they are so they can determine credibility.