For the record, Martin Whitmarsh is the Team Principal for McLaren—I needed to say that because, as a leader, this is the latest petty position he takes on Lewis' departure:
"I hope he thinks today that he's made an awful mistake and I hope he thinks that next year," Whitmarsh told Formula One's official website. "He's made that decision and he has to live with that decision. I have known him since he was 11 and worked with him since his teens and I know we will both be very emotional after Brazil. We have had one or two emotional moments since the decision was taken and I believe, but you must ask him, that we have a very good relationship."
"I was surprised, but I was not shocked. He told me right after Singapore and I am pretty sure he hadn't made up his mind until after Singapore - the Monday or Tuesday after Singapore. I think it is always bad to make a decision in the aftermath of a bad race. He was pretty sure that he was going to win that race and it was a disappointment and as I just said it is never good to make a decision in such a situation. I respect his decision, but I believe that he would be better off with us - we are the stronger team - and we intend to beat him next year!"
"The simple answer is that I don't know. Lewis would be able to answer that question much better than me. If I were speculating there are a number of factors and the prime one, I think, is that there comes a time when a man feels he has to flee the nest. I think it was a bit of that and a range of different emotions. He has been with us for so many years that I do not fully understand it."
"You have to justify your decision. He is not going to say 'hey, they offered me more money'. He is also not going to say that he's made an awful mistake."
After the relentless disappointment Lewis has had to endure this season, Whitmarsh has Lewis' regrets all wrong. And it's amazing that instead of adhering to the high road, Whitmarsh takes the opposite route. Why not wish the lad well and leave it at that? Lord knows Whitmarsh and McLaren have a whole lot more to focus (and worry) on now with unreliabilty, no top driver in their seats and a what to do about a racing brand that has lost it's last greatest asset. I suppose this is the new McLaren way. Ron and the board should be proud of their new brand.

Mark my words...Lewis is going to be on a mission, the kind that will make Whitmarsh very vulnerable. Ron's watching on very closely, Martin.
I'm just saying...