Better known - yes. Mainstream - we have a long way to go.
Things that give me hope: A landlord who though he calls it Caveman, has a lot of respect because a friend of his, diagnosed with MS has been in remission since eating this way. A neighbor who knows how many carbs she needs to go below before going into ketosis. Another neighbor who is anti-soy; he's also anti-grains, but so far won't act on that.
The thing that makes me know that mainstream acceptance is a long way off: The small city I left a year and a half ago has a large main drag with just about ever generic store you can think of - Target, Walmart, all the crap food places (McD, KFC, etc.). A friend of mine tells me that since the economic downturn, the busiest places on this drag are all the fast food places. Anything unique or different has basically died. And this is a city that prides itself in its green mentality.
So when people are talking progressive ideas, but still eating food that isn't food, I think healthy eating and regular sane exercise in the mainstream is still a long way off.