I use AT&T too, but I live all the way over in California (the real Northern California). The DSL service has 2 tiers and I started with the lower priced one. It was relatively fast, but I am a speed freak, so several months ago I upgraded to the quicker and better. Problem is, it ain't that quicker or better and not worth the 6 bucks a month more.
Speed is relative in DSL though. I think it partly depends on how close you are to the main frame (or data center or whatever they call it now - I was a comm specialist in Nam and we called it the main frame). What is the promised speed that AT&T is offering? If you don't have TV service from Comcast, do you have some other TV service? Like a satellite dish? Does that company offer a decent connection?
I've been online since 1992. I started with a 14,4 modem and it wasn't too awfully long ago I had a 56K modem. I used to have this wireless modem thing on the roof of my house that was blazingly fast. I moved and now my best option is AT&T. It's only a little slower than the other thing, but upload speeds suffer even more.