Sorry to butt my head in; will butt it out pronto.  There are in fact a number of sources noting the decline in use of Judea and Samaria among neutral and/or mainstream sources.  Some of these are pro-Israel sources, explicitly lamenting the relative disappearance of the terms.  Meanwhile, none of the three main encyclopedias Wikipedia uses to resolve naming disputes (Britannica, Encarta, and Columbia) define Samaria as a modern region in their entries on the term.  The last edition of Britannica to define Samaria as a modern region was the 1961 edition.