Confidence itself doesn't inform alignment, but it does explain a post that can otherwise be perceived as scummy. I don't really think not should matter if it's your first game with him either, it's mine too and I think it's pretty plain.
I explained in the post there why I was town-reading him? He is forthcoming with positions and takes, they're not fully fleshed out and somewhat reserved, but I expect as scum he would be more cautious about saying anything, which doesn't really seem apparent to me so far.