I noticed with the Blue Ray set as well not sure if any one else also touched on it.
To me the Audio is out of sync with the video by a few seconds.
Either you see mouths moving a few milliseconds (data speak) and then you hear the dialog.
Or the dialog starts and then the mouths move.
I have a Samsung Blue Ray and Sound bar with wireless sub woffer.
My TV is the first generation Samsung LCD 32 inch TV and have never encountered this issue before watching Blue Rays or DVDs.
I am going to try and reach CBS customer support regarding this and the audio issues.
You also could have a way of adjusting your speakers to compensate for any lag or delay.