Could be. Then you know as well as I do they will simply never surrender. Also, I have serious doubts that if they are in serious danger of being overrun, that the area will be getting hit hard with airstrikes.
I think the adults would have a -serious- come to Jesus talk with Barry.
I would suggest that anyone who is worried about adequate air support take a look at the many pictures of Kobane now available. You can see the effects of US based air support - where a single ISIS fighting position "attracted" 500 lbs of laser guided high explosives.
Now that our technology allows precision delivery of large bombs - at the level of hitting a vehicle or a specific part of a building - it should be possible to decimate any concentrated ISIS forces.