I'm not sure about the twisted neck story. I haven't heard that one.
Actually in the beginning the bodies and necks were made at the Corona plant and shipped to Mexico for assembly. I can't remember the exact year, maybe 1998, late ninties anyway, when they started cutting the wood in Mexico.
as of today, all wood (necks and bodies) is cut in corona. And even if they were cut in mexico, they would use the sameq cnc cutters as corona. Plus there's no maple in mexico, so you would be getting that from whatever place corona gets it from