I've had better service from U-Verse and, more recently, AT&T Fiber than I have from Comcast.

But really, the point this thread is making isn't about whether you approve of all of AT&T's business decisions, but rather whether their backbone engineers can properly manage a network.

I'm interested in the opinions of people who have managed default-free BGP peering before on whether AT&T does a good job, but I'm not so much interested in reading another dslreports thread about whether AT&T is a "good ISP".