Robert Shapiro, another member of the team of attorneys who enabled O.J. Simpson to walk, makes the same self-serving argument that "the system worked" in the Casey Anthony trial. He's right that when a case is discussed in public or on Nancy Grace's program, inadmissible evidence gets discussed along with rumors and testimony that is not heard in court and many other factors. Certainly, if you follow a case from afar, you get a very different perspective on it than the jury gets, and not necessarily a more accurate one.
That said, the jury does sometimes get it wrong and when one of Mr. Shapiro's clients gets convicted, he's probably the first to say all the things some are now saying about the Anthony trial: The jury didn't understand the case, they were prejudiced, it's not justice, etc. At times you wonder if some lawyers are prouder of getting an innocent client acquitted or enabling a guilty one to go free.