I thinks this guy is missing the point. Google did uix research and come up with a more usable design philosophy, which makes all apps more consistent. They are now executing those grand-design rules. In the end, apps should be more familiar, and easier to use. The change itself is always frustrating, people who are used to an uix (by learning it), hate change, even if the new uix is simpler.
Google sucks at UI. Period. They had one good UI: the original Google home page. Everything since then has not been about making their products more usable, it's been about finding ways to cram more advertising into their products. This is yet another case of where if you're not paying for it, you're not the customer. So they're not designing it for you.
I do not think that necessarily follows. Even if you are not the customer, they likely (think they) are designing it for you. Because they need you to keep giving them your data, they need you to find the UI easy to use and easy to hand over data.