That's the story that Silicon Alley Insider is running based on this singular tip:
I saw your recent post on Tim Cook at Apple. I don't know if he has been contacted yet but he is the top candidate that Spencer Stuart has identified as the next CEO of GM. I have an inside source at Spencer Stuart.
[Interim CEO Edward E. Whitacre] wants the candidate to come from a company known for operational excellence, innovation and customer satisfaction and in addition he is looking for someone that has turnaround experience. It
