Yes; Vista Way, the main complex for CPs, was originally built to house the construction workers who were brought in to build EPCOT. The other two complexes are located a little farther away and are much newer.
When I was there, which was back in 2005, the CP's were mostly in Vista Way or Chatham Square and the international cast members were mostly in The Commons. The Commons were the best and newest with Chatham right behind. Vista Way was older, but had quite the reputation for being the part dorms.