Very well illustrated and perfectly argued throughout, as usual!
I enjoyed siding with whatever view you took at a given section! First I agreed with the statistical anomaly idea, then I thought the huge energy of matter/anti-matter galaxy collisions would surely be detectable, as well as anti-matter particles on Earth, and by the end I was like "we don't know, more research needed"!
It's a very clear and accessible article and that's not easy to do for physics.
EDIT: I just read this last night, and it seems the author of the book puts dark matter under the list of projects that are probably a waste of time and resources for physics!
RE: Are there Antimatter Regions inside our Hubble Bubble? (Particle Physics Series – Episode 4D)