That's pretty much what I had thought before I looked at the catalog. It was just interesting that they thought it important enough to list the neck joint type for every guitar in the catalog, yet seemingly were inconsistent in the terminology used. They don't list that data type for their online specs, but do include it in their printed materials.
Quite honestly, I was surprised to see that they used hide glue at all, even on the Masterbilts.
Thanks for the verification.