I recently read Greene's essay and I thought it was a nice buttressing of ideas that I was originally exposed to in 2001 while reading "Beyond anthropomorphism". The challenge with Eliezer's earlier writing is that it is too injected with future shock to be comfortable for most non-transhumanists to read. The challenge with Eliezer's more recent writing is that it is too long for a blog format and much more suited for a book, which forces people to focus on the one thing.

The title of Greene's thesis is tongue-in-cheek. Based on my understanding of Eliezer's conception of morality, I would definitely call him irrealist.