ISPs are supposed to give consumers an accurate estimate of the maximum speed their lines can support but they should also explain the actual speed may be slower.
Relativity would be unaffected by this; the so-called speed of light, c, would then not be the actual speed at which light moves, but a constant of nature which is the maximum speed that any object could theoretically attain in space-time.
But a mystery shopper exercise carried out by Ofcom late last year showed that while 85% of callers were provided with a maximum speed estimate for their line before they signed up, three-quarters of them were not warned that their actual speed was likely to be slower.
These crashes will happen whatever the actual speed limit.
Participants were not informed about the actual speed limit.
Hence, it does not reflect the actual speed behaviour.
Participants generally underestimated actual speed (except in the slowest condition).
Figure 5 The predictive traffic state vs. actual speed.
Moreover, your actual speed almost certainly will be slower.
That is, the actual speed of the light will decrease.
