fjc said : “But what if this strategy works in the sense that we can see some light at the end of this long tunnel?”
It depends on how long a tunnel and how bright the light.
If we are talking years more the first question I think of is how do we do that with the US military as badly strained as it is?
As for the bright light we come back to the definition of success. What is it? As Petraeus said, there is no military solution without political solutions. And the Iraqi political situation seems to be getting worse by the minute. So no matter how brilliantly our military performs if the Iraqi government cannot do what needs to be done, it all falls apart.
Take a look at a short interview with Michael Ware: (about halfway down the page, after Cheney coverage)
http://transcripts.cnn.com/TRANSCRIPTS/0707/31/acd.01.htmlsnip
"What we're seeing is -- is, to a degree, some sleight of hand. What America needs to come clean about is that it's achieving these successes by cutting deals primarily with its enemies. We have all heard the administration praise the work of the tribal sheiks in turning against al Qaeda. Well, this is just a euphemism for the Sunni insurgency. That's who has turned against al Qaeda.
snip
..yes, sectarian violence is down, but let's have a look at that. More than two million people have fled this country. Fifty thousand are still fleeing every month, according to the United Nations. So, there's less people to be killed. And those who stay increasingly are in ethnically cleansed neighborhoods. They have been segregated.
snip
But, honestly, Anderson, it is a myth to believe that the Iraqi forces have been rid of their sectarian or militia ties. No matter how much any commander wants to tell you, the minute the American forces turn their backs, these guys revert to form, be that Sunni or Shia lines, Kurdish ethnic lines, or be it militia lines.
So, there is still no sense of unity. And, without America to act as the big baby-sitter, this thing is not going to last. So, all these successes that O'Hanlon and Pollack point to exist. They're real. But the report is very one-dimensional. It doesn't look at what's being done to achieve this and what long-term sustainability there is."
America as baby-sitter. In other words: "sustainable stability"