"Could Apple be assembling some new iMacs in the U.S.? A teardown of a new model introduced on Thursday shows an iMac with this marking.Some iMacs labeled 'Assembled in USA,' teardown shows | Apple - CNET News
A teardown by iFixit revealed markings on the back of an iMac that say, "Designed by Apple in California, Assembled in USA.""
Monday, December 03, 2012
Some iMacs labeled 'Assembled in USA,' teardown shows | Apple - CNET News
Perhaps a leading indicator; also see The Insourcing Boom (The Atlantic)