Kevin at The Washington Monthly has written the post I've been writing in my head for the past 24 hours.
As Kevin notes, stories of Gdub cracking are not new, but always of dubious sourcing. I will ad to Kevin's a couple reports from my memory. The first dates back to his election loss in 2000. The report goes that Gdub had no idea that the election was tight because no one had told him (remember, he doesn't read the paper). Gdub was stunned at the loss and angry at his aids for losing the election.
The second were reports from last year when the campaign wasn't going so well, of him moving between shouting obsenities at staff and quoted scripture to them.
It was also leaked from the WH that the Meyers pick for SC came from an isolated Gdub who was angry at this staff.
Here is my bottom line: First, I don't believe anything Capital Hill Blue has to say.
Second, I think one doesn't have to look very hard to find a history of Gdub not dealing well with adversity. He is a classic underachieving spoiled 'rich kid' who can't cope with things not going his way.
Third, It does not appear that events for Bush will improve for the forseeable future. So, if the above reports are true, we will likely know within the next several months because he will have an outburst that can't be hidden.