I certainly don't think Scott belongs to the Oxford school. He's probably just one of those people for whom the existence of probability-like numbers in the density matrix is enough. (The flaw of this perspective is that you need these numbers to appear in your ontology as the relative frequencies of something, because that's what they are in reality.)
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.