I think so too, and I think they know that. It sounds like they are "only" planning to ramp US production from the current rate of ~400k total units per year to just over 500k per year. Of course, with China coming online, that still leaves a net increase.
It sounds like they may have backed away from some of the more extreme high end projections for the Y. It looks like worldwide production may double within 1-2 years, though.