Alan:
This should do it:
var x = $(xData.responseXML).SPFilterNode("z:row").SPXmlToJson({
mapping: {
ows_Created: {mappedName: "Created", objectType: "Text"},
ows_LinkTitle: {mappedName: "LinkedTitle", objectType: "Text"},
ows_Title: {mappedName: "Title", objectType: "Text"},
ows_ID: {mappedName: "ID", objectType: "Counter"}
},
includeAllAttrs: false,
removeOws: true
});
You had renamed all of the mappedName attributes.
M.