I was working as a sub contractor on the 2000 BeeGees concert, the "Millenium Concert" or BG2KYou don't understand the difference between end-to-end analogue and end-to-end digital with compression. Compression significantly adds to the delay.
When terrestrial TV and radio was analogue, producers could switch between the signal leaving the console and "check receivers" picking up a feed from the same transmitter as the audience - in order to detect issues. Satellite distribution, digital radio, digital TV and (even worse) Internet distribution make this impossible.
If you look at my sig, you might notice I have some expertise in these field. For example when designing very large fiber networks for media use, we assumed 1ms round-trip latency for a light pulse per 100km of fibre. If you assume a European country with 1000km the longest distance, the optical delay, one way, is approximately 5ms. You are unable to perceive this as a delay. Radio frequency transmission is even faster.
So, yet again let me state: the audience on terrestrial analogue broadcasting heard the sound of the glockenspiel a few milliseconds after it was struck (assuming close micing)
So I can speak from experience that, at least then, there was no perceptible delay in the transmission - since we watched on a TV the coverage, in a room backstage -
to check over the air, what we were sending out. Would have noticed. Met Maurice Gibb quite often later on, super nice guy. Miss him.
Cheers