How would you notice? You don't need to worry about this. Unless you had a TV nearby to compare to (in which case you wouldn't need the device, right?), there'd be no way for you to detect the delay for normal TV viewing. Think about it: whenever you watch TV there's no way for you to tell how many milliseconds (or even seconds) 'late' you're seeing the image. When a 'live' TV broadcast is on a delay for censorship purposes, can you tell the difference? Without some some temporal reference, you won't notice the latency of a tv tuner/video capture device.