No, I base my opinion on the fact that you have no idea what was going inside Libbi's head. None. Zero. But jury were presented with some facts and were convinced that Libby lied. Because if a person doesn't remember something he would say just that. "I don't recall". And if Libby made some statements implies that turned out false means that he made lied. So, yes I would believe people who were presented with facts and not a person who doesn't have those facts.
P.S. I thought to convict someone all 12 jurors have to come to agreement. Of course it is possible that all 12 jurors turned out biased. Too bad the odds are similar to winning a powerball.