I agree with your analysis, but I also understand where PZ is coming from. You write above that the portion of the genome coding for the brain is small. PZ replies that the small part of the genome you are referring to does not by itself explain the brain; you also need to understand the decoding algorithm - itself scattered through the whole genome and perhaps also the zygotic "epigenome". You might perhaps clarify that what you were talking about with "small portion of the genome" was the Kolmogorov complexity, so you were already including the decoding algorithm in your estimate.

The problem is, how do you get the point through to PZ and other biologists who come at the question from an evo-devo PoV? I think that someone ought to write a comment correcting PZ, but in order to do so, the commenter would have to speak the languages of three fields - neuroscience, evo-devo, and information-theory. And understand all three well enough to unpack the jargon to laymen without thereby loosing credibility with people who do know one or more of the three fields.