The article recommends doing a cume on the "ghost_record_count" of sys.dm_db_index_physical_stats. It shows no ghost records, which is what I expected because of the very low page counts for the indexes compared to the "unused" pages using sp_spaceused.
In another search, this appears to be common problem for WhatsUp Gold. Some claim that it's because of retention settings but that doesn't seem to be the case here.