The key word is Perception. Which in an insurgency is everything.

All the FSA has to do is stage enough attacks in the capital to keep disproportionate number of governmental Syrian troops pinned down there. And better yet, troops are going to likely be the most elite and loyal- leaving the least reliable, least trained, least supported to fight in other areas. So just a few hundred FSA fighters (or fewer perhaps, I don’t have their OOB) will keep the Syrian army way busier than it can afford to be.

So yeah, this looks like it may be starting to turn around for the rebels. They don’t need to win any actual fights to win the war. If this keeps up long enough the Syrian regime will begin to crack on its own.