Truth be told, I'm not sure the paleo movement has had its "tipping point" yet. If anyone is familiar with the Malcolm Gladwell book, I believe the original poster was asking about that moment with the "massive leap" comment. I don't think that we have had it yet. The NYT article was a help, seeing John Durant on the Colbert Report is good and helps raise awareness and the multitude of blogs are a great resource for those of us who are curious but the general public is still ignorant or don't care. My own mother refuses to admit that organic foods are worth wild.
A good friend of mine had her mother admitted to the hospital due to what she thought was a heart attack but was actually her blood sugar spiking over 400. She was pre-diabetic and is now full blown diabetic. So I sent her a lengthy facebook message (she's a cool mom like that) explaining the benefits of fat and meat and how long term health is really related to control your insulin levels, ESPECIALLY for an overweight diabetic. Her response was "thanks for the effort hun but I'm going to stick to whole grains and rice and limit my fat and meat intake". I really don't think that this is unusual or unique. I get a lot of odd looks and befuddleness when I discuss diet and food and exercise.
I can trace my interest in paleo/primal lifestyle all the way back to fantasy baseball, as odd as that sounds haha. In an effort to gain an edge in fantasy baseball, I read Will Carroll's Saving the Pitcher. In the book, he discussed Jose Reyes overcoming his hamstring issues by using Pavel Tsatsouline's Relax into Stretch techniques. This led me to trying the book and leading me to the wonderful world of kettlebells. This led to a drive for functional fitness and when I started up my twitter account, I had a lot of kettlebell activity and one of my followers is Sandy Sommer, who is an RKC trainer and a huge backer of Mark Sisson. Quite funny how life works sometimes.
I'm still hoping for that tipping point to come. Something BIG has to happen, like Obama coming out and supporting the paleo movement and overhauling the FDA or something to that effect. With the news of genetically modified alfalfa being OKed by the Supreme Court, I really don't hold out hope for this. Looks like I'm going to have to start my own farm after all.