@thyname well, the article is way off the mark. Especially the first paragraph where it says it applies to all digital connections. What they are talking about can apply under some circumstances to asynchronous digital connections without error detection and correction.
Ethernet is synchronous, and has error detections, but that is just one layer, the next layer also have error detection, call IP, then you have TCP, also have error detection and correction, and lastly, you have the application layers, also have error detection and correction. So it doesn’t apply.
Second, no human card here a different of 1 ns. You need to get into 300 to 400 ms, or 300,000 or 400,000 times larger difference before human hearing can register an issue.
and, clock rates don’t work like that in switches. If you want to learn about that very low level detail, have fun, here is a place to start: