The evidence is circumstantial, certainly. But it's possible. Lutz said at the recent Reuters Auto Summit that, no matter what GM thinks of hybrids, the company made a mistake letting Toyota get so far ahead with hybrids such that now the Japanese brand has become practically synonymous with hybrids and is perceived to be atop a green moral high ground. True, there's the Volt, and GM might not be doing anything with Toyota at all and it could just be a rumor. Or GM could surprise us with something completely new -- it wouldn't be the first time.