AT&T is bar none the worst company in the world when it comes to Customer Service. Although, in this case, the conversation could've been applied to just about any support call.
While I don't doubt that AT&T internet service is terrible in some cases, I do have to say that they're wireless telephone support is actually quite good every time I've called. Always helpful, always apologetic, and issues get resolved quickly the times I've called.
It's the one thing that I think I'll miss when the iPhone is available elsewhere. I dread having to deal with Verizon's customer support again when they finally have a few other phone choices I'm interested in.