Hi Russ, I just checked some of my code and it is obj. Here is how I navigate all of the tables in the document's main flow:
var tbl = 0, textList = 0, i = 0;
textList = doc.MainFlowInDoc.GetText(Constants.FTI_TblAnchor);
for (i = 0; i < textList.length; i += 1) { tbl = textList[i].obj; // Process the table here.
}