Are you data only or do you have TV service also? Are you using the provided wireless on the Uverse RG or is it a wired connection? The question is how much simultaneous data is being delivered for different services. You can run into local QoS problems on the RG, especially with the wireless.
I use video conferencing over Skype and GoTo Meeting with multi-way live feeds every day and I rarely have any issues. I may see artifacts and even some rare audio distortion but it is usually smooth as silk. I am on the 24/3 package with my wife who is a DVR fiend and is constantly recording 2 or more shows in the background.--
Scott, CCIE #14618 Routing & Switching