One question that's been asked repeatedly over the past thirteen months is why Washington has been unable to achieve the Pentagon's stated goal of "degrading and defeating" ISIS despite the fact that the "battle" pits the most advanced air force on the planet against what amounts to a ragtag band of militants running around the desert in basketball shoes. 

Those of a skeptical persuasion have been inclined to suggest that perhaps the US isn't fully committed to the fight. Explanations for that suggestion range from the mainstream (the White House is loathe to get the US into another Mid-East war) to the "conspiratorial" (the CIA created ISIS and thus doesn't want to destroy the group due to its value as a strategic asset). 

The implication in all of this is that a modern army that was truly determined to destroy the group could likely do so in a matter of months if not weeks and so once Russia began flying sorties from Latakia, the world was anxious to see just how long the various rebel groups operating in Syria could hold up under bombardment by the Russian air force.