Laszlo Bock, the head of human resources at Google , made quite a splash with his announcement last year that the technology firm has changed the way it hires people. Gone are the brainteaser-style interview questions that so many candidates abhorred. But also gone, it would seem, is any concern with discovering how smart applicants really are. "GPAs are worthless as a criteria for hiring, and test scores are worthless.... We found that they don't predict anything," Bock told the New York Times.