I read the same, somewhere; but can't find upload details on their "Shop for Internet" site. Here, maybe?
»www.att-services.net/att-u-verse ··· net.html
(Okay, so this chart is for VDSL ...)
Are you not close to the DSLAM? 3.0 Mbs speed is the fastest listed for a residence at 9,156 feet from the CO based DSLAM.
Which modem do you have?--
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum