I don't recall that? What the heck is a 'pure CA hog'?
Hog isle is a locality of Bi. They are thought to have hypo but the sunsets were hypo boas (Central American or Colombian) bred to a hog isle, they were always a locality mix. CA boas are a locality, Hog Isle is a locality. This is what I remember when they were first posted about on kingsnake a long time ago? Did D&M do a write up about it claiming it's all pure hog locality? I'd be interested in reading that. I know back when they first came out people were crossing the localities to replicate their results.
I have two hog isles, one appears as a 'hypo' version when compared to the other but they are just variations of the locality. 'Hypo hogs' have always been locality crosses.