When I finally squeezed the actual speed of it out of him the answer was 18 Mbps, for $60 a month (of course he could get me a special deal of $40 for the first 3 months, which is the same deal as on their website).
I've used them before (AT&T Uverse) and they require an ATT router/modem, for an additional fee of course, even though using their hardware is technically completely unnecessary.
I actually told him that Time Warner was currently cheaper and more reliable than what he was offering, which is true unfortunately.
AT&T is a joke.