I met someone today (in her 20s) who grew up thinking [Walt] Disney World was it, and when she did learn of Disneyland, thought it had opened after WDW! I was so stunned I didn't even correct her nomenclature!
Currently an archivist with the Federal government, I am also (variously) a Disneyland encyclopedist, thesaurer, nomenclaturist and gazetteer. As such, I am engaged in researching all things Disneyland. Nitpicking welcomed.