Mickey D's=McDonald's

[Sam Clements]

While it may be mundane, there is a thread  over at the StraightDope which intimates that the origin of the term "Mickey D's" for McDonald's was originated in/or for the Black community.  Many posters have offered that they first heard it in commercials in the 1980's, and many offered that Afro-American actors were in the commercials.  I can't vouch for any of the memories.

Can any database jockey find a cite for "Mickey D's" ?

Sam Clements