"All tests have shown that customers' throughput on the Hyperoptic fibre network will be 95% of their connection speeds."
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Hands up any reader with genuine GbE experience who's ever seen 95% of advertised speed in any real circumstances.
Hands up anyone who thinks this 95% claim is at all credible, even before you start thinking about other bottlenecks in the system.
If you re-read the key passage (see below), I think it is actually talking about the maximal throughput any given line can possibly attain in the best case (e.g. 95% of 1Gbps, 5% disappears with protocol overheads and other related stuff). I _don't_ think they are referring to the ability for all customers connected to sustain 95% throughput at all times (implying they have a gargantuan backhaul).
However, the sentence seems (deliberately?) badly worded, and gives the impression that they are.
All tests have shown that customers' throughput on the Hyperoptic fibre network will be 95% of their connection speeds.
I think they are saying something akin to 'You buy a 20Mbps ADSL connection, you might only get 20% of that due to line length, attenuation, etc, but with hyperoptic you get 95% of xxMbps)'. Which happens to be no miracle given that they're doing FTTH and they wouldn't have the same distance related headaches.
Anyway, seems fishy, I'd like to hear them clarify it.