It can be hard to tell, so if you have something you think is nice, go ahead and toss it in.
It seems that filing a complaint with the FCC makes Comcast nervous. They're crediting every day since my first call, as well as a credit for the first time they failed to show, and are supposed to be out tomorrow. So with luck I'll be back with reliable internet by Friday.
Skype just updated for me so be sure to update before Friday.