Quite untrue. It's a bigger story than just Novak's source, or the lack of one. What Novak has revealed is: 1) The source is not political 2) the source revealed the information inadvertently, and 3) the source and circumstances were known to the prosecutor.
This is actually fairly large, because people have wondered all along why Novak didn't have to go to prison to protect his sources. Now we know: Fitz could not prove any crime on the basis of the original story, and he knew it. He therefore used Novak's information as a back story for a fishing expedition, which he pursued through Miller and others.
In the end, he could prove nothing, so he took contradictory statements made by a person who is a conduit of an enormous amount of information (Libby) and manufactured a "crime."
Fitz is a POS, and now the whole world has the evidence of it.