As to your link, thanks for the general info about TiO2, but not sure how it relates to dvabs direct criticism of Mythic, other than he has a right to his opinion. I guess when you presented a link, I was looking for something like: "the following manufacturers have unsafe levels of TiO2 in their products: Mythic, SW, BM...etc." I think its important to consider levels. We can all breathe low levels of carbon monoxide without ill effect, we do it every day. We can even tolerate levels of impurity in our drinking water.
To me the point is that Mythic has a formulation that exceeds by far every criteria placed on manufacturers by osha, epa, etc. As painters, we should support that. We work with these products day in and day out for years of our lives. When new technologies come out that reduce our long term exposure and provide excellent performance, which I personally can attest to the fact that Mythic does, why would someone take a cynical stance and try to denigrate it as marketing bs? The facts are what they are. And sure, we all have a right to our opinions.