have assholes been saying this a lot??
"I wonder if Michelle responds to those who write her letters but are not of celebrity or socialite status"
"The First Lady, who is very kind and gracious, is known for her personal responses to letters — which happens very often. For example here: http://www.gcsny.org
Folks that have written the First Lady Michelle Obama have been invited to visit the White House, like this Girl Scouts troop: http://rochesterhomepage.net/fulltext?nxd_id=308882.
In fact, the Obama family is well known for responding to letters, and together have received more correspondence than any other first family in our history. The President and First Lady both have a fairly sophisticated system of correspondence response. The Chicago Tribune details the First Lady system here: