and I have $5.00 says they will not be in complete synch. Have watched ball game on bedroom Xi6 within ear shot of living room TV and Xi6 which my wife is watching. Not in 100% synch. Sometimes 1-2 seconds difference.
To me that makes sense tho. While technically being broadcast at the same time.. Each box when you tune to the channel, has to start the stream and buffer for a few seconds, that buffer could cause that delay.