I thought that the whole "Welcome Home" greeting was specific to DVC but I noticed that that's how we were greeted when we stayed at the Pop (I know; I know) during March, 2009. The CMs *and* the recorded messages on the busses all welcomed us home when we arrived back to the Pop.
I know it is a trivial matter, but I too, am a little disappointed that "welcome home" is used more widespread. It just doesnt make you feel as special when hearing it now.
I know, I know...but I still love hearing it. It makes me feel special. If they can make someone's trip a little more enjoyable by making them feel at home during their stay, so be it! I don't mind sharing a little of the magic.
The reason they use it at all the resorts is because Disney eventually plans on having a DVC at every hotel and they are just trying to get everyone used to it.
On a side note I called yesterday to book the free dining package because we are out of points and the Disney travel lady could see that we had a reservation at HH in June.