American Labor More Efficient than Chinese?

According to Bill Waddell, Apple should be having a hard time justifying why they would rather manufacture IPod's in China than in the States. Although the cost of labor is obviously skewed in China's favor, technology and time efficiency would make it so that it is actually more efficient both time and money wise for Apple to simply manufacture IPods in the United States. So what other companies are out there, using cheap Chinese labor when they could be making more of a profit by just manufacturing in America? Is this an adequate way of explaining why labor should be brought back to the States?