Subject: Re: Barrons Article
Extract I thought relevant:

As for Buffett, there is some anxiety, as to be expected, over how able Abel will be. Again, who knows, but remember, this is really Buffett's biggest call ever. Picking a new CEO is "the most important decision that you make," Buffett said to me five years ago. "It isn't what their IQ is. And it isn't even necessarily the top [person] in a given type of managerial skill, if they're the kind that will leave you tomorrow. You really want somebody that is devoted to Berkshire."