James Kirkup writes in this morning's Telegraph that whatever the outcome of the G20 summit, it will be hailed as an historic, triumphant success by Gordon Brown. Even if Sarkozy flounces out, he would no doubt say it was fantastic that 19 of the 20 have signed up to whatever they are signing up to. I don't blame him for that. It's what politicians do. Brown knows that if his political fortunes are to rise, the G20 has to be seen as a success - both in terms of PR and substance.
But it's not Brown's spin which we need to observe, interesting though that will be. The real story will be the reaction of the financial markets. If they blow a collective raspberry and stock markets around the world tank, then that will speak for itself, and no amount of Brown spin will be able to counter that.
Let me be plain. I hope the summit is a success. And if it is, I won't begrudge Gordon Brown his moment of glory. But my definition of success may be very different from Gordon's. One of my definitions of success will be if Angela Merkel and Nicolas Sarkozy get their way on preventing yet more taxpayers' money being pissed down the drain.