I agree, Nennie. I read a year or two ago that not only are the other homes filler, in at least one case they used friends' homes. The couple on that epi said they felt so bad saying negative things when their friends were doing them a favor letting their homes be used. It pretty much ruined the show for me. If I watch now it is to see what changes they make to the home they choose after moving in.
Has anyone watched the show they have on now that follows up on the home owners? I saw an update show a year or so ago where the buyer felt huge remorse for the choice he made. He went for getting more house for the money farther out as opposed to a close in location with more to do. As a young, active single guy, it was the wrong decision.