Where are you getting your data for traditional HG? Since without knowing what group we are comparing against, it is really hard to make valid comparisons.
That being said, another few potential reasons are the amount of access we have to food now and the limited nutritional density in a lot of the conventional available food (due to treating them like commodities).
As far as good levels, I'm well under the 220 mg/dl. I would have to pull my numbers, but I think my last test had something like 110 total, 50 HG, 25 Trig.