Subjectivism requires that moral claims have truth values which , in principle, dpened on the individual making them
This is not true of all subjectivisms, as the link makes totally clear. Subjective simply means that something is mind-dependent; it need not be the mind of the person making the claim-- or not only the mind of the person making the claim. For instance, the facts that determine whether or not a moral claim is true could consist in just the moral opinions and attitudes where all humans overlap.
There are people who use "subjective" to mean "mental", but they sholudn't.
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: