My objection is that he's talking about the purely physical activity of the brain causing someone to write about consciousness and the 'mysterious redness of red', which is something a zombie could also do (by Chalmer's argument). Eliezer, on the other hand, is trying to explain what's wrong with Chalmers' argument. He's talking about the effect of that metaphysical 'hearer' on the world, something which Chalmers says is zero. That's also what DavidPlumpton is asking about, I think.
I don't believe that p-zombies are well defined in the first place - since consciousness is nothing more than the normal action of the brain, and p-zombies have normal brain action, p-zombies experience consciousness. This is a contradiction, which is a big problem for those who believe that p-zombies are a logically coherent concept.
In Zombies! Zombies? Eliezer mentions that one aspect of consciousness is that it can causally affect the real world, e.g. cause you to say "I feel conscious right now", or result in me typing out these words.
Even if a generally accepted mechanism of consciousness has not been found yet are there any tentative explanations for this "can change world" property? Googling around I was unable to find anything (although Zombies are certainly popular).
I had an idea of how this might work, but just wanted to see if it was worth the effort of writing.