Even the parts still made in Taiwan are often made by imported labor, last time I visited a bike factory, many signs were _only_ in thai. Taiwanese labor is just too expensive to hit the margins targets US bike manufacturers are looking for. It looks like the shift that's been happening toward SE Asia will just accelerate.
Re-branded isn't quite correct, they are a contract manufacturer, so they are made specifically for the brands. Rebranded makes me think of open mold or catalog frames.