ACM, come on, stop spreading disinformation. You know well and good nothing travels at the speed of light down the wire or fiber. We have converters on the end, and in fact in glass it is the speed of light divided by the refractive index of the glass. Even in the best of times, not c. I just hate that, when a customer is yelling at me telling me that the latency should be absolute 0, they start pointing at articles like this, "see, even the mighty ACM says it should be c".

Ugh.