Sorry, but there is no exaggeration here. The pseed of light is 300000000 metres per seconds (or 186282 mph in old money). That is about 7 times around the earth in a second. Electricity in a copper cable travels at 99.9% of that speed. A metre difference in cable gives a delay of 300000000 of a second, which even the people on this forum cant hear
The speed of a phone call cannot be compared due to the various exchanges and processing the signal goes through

The speed of a phone call cannot be compared due to the various exchanges and processing the signal goes through