It's hard to put a timeline on it. I would say that you need to be looking at a minimum of six months in the south in terms of what's happening there. We just haven't been at it long enough. One battle does not a campaign make. Just because we've had a bit of a rough go for a period of time doesn't mean the strategy is not sound. Bear in mind that the other guy has a vote. The other guy doesn't want you to succeed. He's going to do everything he can to stop you, so there's that element to it as well.
If you look at the longer-term campaign, step back from this and look at how long ISAF has been there. It went there in 2002-03. Its current campaign of provincial reconstruction teams started in the north, moved to the west, and now is moving south. Ultimately, the next phase is to go to the east. It started with the easy parts, and in the degree of difficulty, it's getting more and more difficult as it goes along. It's taken a couple of years to get this far. Given that the south is a tough nut to crack, it could take several years. It could take a lot longer. I don't want to mislead you, but our expectations need to be tempered with the reality of how difficult these things are.
I was saying you need a minimum of six months to reconsider the strategy. That doesn't mean you change it. Give the commanders in theatres at least six months to figure out whether they have it right or not. They'll normally tell you pretty quickly if they think it should change.