Enduring America, a useful sources for media summations on Syria and (highly-debated) FSA claims of successes suggests that FSA forces are indeed increasingly gaining ground against Assad:
For several weeks there has been a growing number of rumors, low-quality Youtube videos, and eyewitness reports that suggested that not only was the FSA winning in Deir Ez Zor, Lattakia, and Aleppo, but it was on the brink of major victories in all three provinces. Similarly, there is a growing body of inconclusive evidence that the FSA is surging in Daraa province, and was increasingly effective in and around Damascus. While individual reports of this nature may or may not each be true, the trend lines were beginning to look clear.
The spread of the rebellion throughout the country means that even the vaunted internal security forces have to weigh whether moving one force to Point A will weaken Point B fatally, is surely impacting developments on the ground – desertion and heavy casualties continue to mount for the state’s forces. And Syria’s unwillingness to pursue the fight all the way to the Turkish or Iraqi borders for fear of igniting a wider conflagration must give breathing room not just to refugees, but to arms smugglers and militiamen:
For more than a week … that body of evidence has been harder and harder to dismiss as noise and rumor. With well documented victories yesterday, the FSA has encouraged us to post headlines that we have been sitting on for a long time.