I'm a getting 200 response code, with a null result set:
{"responseData": {"results":[],"cursor":{"pages":
[],"estimatedResultCount":"0","currentPageIndex":
0,"moreResultsUrl":"
http://www.google.com/search?tbm\u003dblg\u0026oe
\u003dutf8\u0026ie\u003dutf8\u0026safe\u003dactive\u0026source\u003duds
\u0026start\u003d0\u0026hl\u003den\u0026q\u003d%22Google+Apps+Script
%22"}}, "responseDetails": null, "responseStatus": 200}