TV pixellation and stutter New Uverse customer

I just had my ATT Uverse installed last week and have had issues with picture pixellation and picture stuttering since day 1 both on my wireless receiver and wired receiver. The Uverse tech who wired the house used the existing coax from my prior DirecTV and was here no more than an hour. Did he do a horrible job or is this how the Uverse picture is supposed to look! It literally looks like every channel is floating on the screen. I have both receiver connected via HDMI. I've already tried powering all down and rebooting but the picture almost looks worse. I'm seriously thinking of canceling and going back to DirecTV if this keeps up!