As a point of reference, this is a link to the United States Chess Federations list of top 100 players 7 and under by rating (for games played in tournaments over the board).
http://main.uschess.org/component/option,com_top_players/Itemid,371?op=list&month=1008&f=foreign&l=Top Age 7 and Under&h=Top Age 7 and Under regardless of Country, Residence, or Federation.
Regardless of what your DS' true ratings are, school chess clubs can be a great way to find like-minded friends. And, if they like to compete, tournaments are filled with gifted kids.
My DS didn't "discover" chess until he took a park and recreation class when he was nine. It has been a great arena for continuous learning since.