This means very little to me (no pun intended). Obviously, a precedent has been set (the Joyce call), that you will eventually be forgiven by the public if you man up to your "mistake" and admit you were wrong. As Means is heavily perceived as being wrong, exacerbating it by saying he still believes he got it right would have only made things worse. However, he can limit the damage by admitting the call is wrong, which is how many people see the call.
I'm not saying that Means actually thinks he's right or wrong. There is no way to know what he actually thinks. I'm just saying that the smart thing for him to say in this situation is that he screwed it up, and to move on from there, and let the issue die down. I can't be positive that he actually feels that way today.