AT&T Fiber Speeds (New Install)

Hi All,

Well my AT&T Fiber was installed today. So far the highest speeds I've seen (when plugged into the 5268AC directly) are 450mbit downstream and about 950mbit upstream. It's pretty consistently only about half as fast on the downstream as the upstream. I showed the AT&T tech while he was here and he clearly didn't understand what I was saying. He said no single device ever gets more than 350mbit downstream and that I should try and test by running multiple speed tests simultaneously from multiple devices. I disagreed and tried to explain that I considered that unacceptable, but he said all his tests came back okay and there was nothing he could do.

So I spent 30 minutes on the phone with AT&T going through the modem reboot, the "what operating system are you running?" nonsense questions, and now there's another tech coming tomorrow afternoon. I guess the reason I'm posting is to see if anyone has any recommendations on getting them to deliver what was promised. Obviously 450mbit is very fast, but I'm paying for gigabit and that's what I'm expecting to at least get close to. Has anyone else seen what I'm seeing with the upstream being much faster than the down? Any recommendations on working with AT&T?

Thanks!