Yeah that's the problem I'm trying to understand. Anandtech is reputable (according to most) and Dr Ian Cutress is also. So... for him to get it so wrong, and so far away from what the rest of the tech press has gotten is really confounding.
As an aside to all of that, I'm happy with the Zen+ results. They got their 10% performance boost which is more than what Intel have done over the recent years.
EDIT: Perhaps because they're only using a GTX1080 and not the Ti... there's a GPU bottleneck and Ryzen is pulling ahead?