The same is said for the A380. I think you'll find only the final assembly is done in house! Pretty scary hey.
Depends what you mean by in house. If you mean at the final factory that puts it all together, then you are pretty much right. But the wings for example are made by an Airbus owned company in the UK as are many other components. Although they too use parts made off site by both Airbus owned companies and private contractors.