Davidil, everything is on a continuum from best-to-worst, and what makes it harder is that, as we are all individuals with our individual health quirks, even drawing such a continuum will be a very personal matter.
Example - I have a celiac daughter, so having a wheat/gluten-continuum at all is not possible for her.
Me - I don't seem to react in any noticeable way to wheat gluten (it is more the carb load that gets me), so I can sort shades of gray in modern hybrid wheat, ancient wheat, whole grain wheat, milled wheat (white/highly processed), sprouted wheat, no wheat no excuses, etc. But that isn't really the point of Primal/Paleo.
In the end, it is up to you. But since you asked us - I am a stickler for definitions, and if you self-identify as Paleo or Primal, at some point, the grains just gotta go. And if you are wondering why, you haven't really done your Primal/Paleo reading yet.
I get the question, as I wondered that myself at the beginning of reading Wheat Belly, as I was already familiar with the ancient strains. But Primal ancient wheat is simply an oxymoron, according to me.
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC