What I am saying is that there are objective facts, but that a wavefunction being two components or one simply happens not to be one of those facts. It's like "is this painting beautiful?" If you look closely enough at one person and make some idealizations, you can say objectively (well, plus idealizations) whether a painting is beautiful for that person, but what is thus beautiful for one person still doesn't have to be beautiful for the next.
On the other hand, if you, say, explained Peano arithmetic to two different people and asked them whether some statement was a theorem or not (and made some idealizations), what is a theorem for one person is a theorem for the next. Or if you asked them to measure the space-time interval between two events. Or if you asked them about the various components of a wavefunction, given a certain basis.
http://www.scottaaronson.com/blog/?p=1103
Eliezer's gung-ho attitude about the realism of the Many Worlds Interpretation always rubbed me the wrong way, especially in the podcast between both him and Scott (around 8:43 in http://bloggingheads.tv/videos/2220). I've seen a similar sentiment expressed before about the MWI sequences. And I say that still believing it to be the most seemingly correct of the available interpretations.
I feel Scott's post does an excellent job grounding it as a possibly correct, and in-principle falsifiable interpretation.