One of the sites is the "**************.net" website. They confirmed that the offer was only for non-us citizens. Here is the article:
NEWS ON FREE DINING AT WALT DISNEY WORLD IN 2013…SORTA
One of my crack sources–the mysterious J–just emailed me to let me know that free dining for the fall of 2013 will be out shortly for South American and European visitors.
The booking window will open May 9, and the offer will cover arrival dates of September 2 through September 25.
At the values, the offer is the quick service dining plan for free, and at the moderates and deluxes, the offer is the regular dining plan for free.
I refuse to read too much into the arrival dates right now, so my takeaway is that since this offer will soon be out for much of the rest of the world, we’ll see an August/September free dining deal out for US residents visitors in May as well.