EDIT: Here is the other highly relevant post I was thinking of.
I think what he is talking about there is lack of disagreement in the sense of incommensurability, or orthogonality as it is locally known. Lack of disagreement int he sense of convergence or consensus is a very different thing.
There seems to be a widespread impression that the metaethics sequence was not very successful as an explanation of Eliezer Yudkowsky's views. It even says so on the wiki. And frankly, I'm puzzled by this... hence the "apparently" in this post's title. When I read the metaethics sequence, it seemed to make perfect sense to me. I can think of a couple things that may have made me different from the average OB/LW reader in this regard: