If I recall correct kitz daughter has had G.Fast considerably longer than a month, with Zen.
@Spudgun
Yup since end of May. They were on one of the listed trial exchanges and the order was first placed end Feb/beginning March.
There was a delay with installation due to waiting on a new host link for Zen to be installed to take g.fast connections ... rather than use Zen existing GEA cablelinks for FTTC & LLU. What that means is that Zen is using BTw backhaul for g.fast rather than their own network, but they still needed to purchase a host link at their Manchester PoP to connect up to the BTw backhaul.
13ms rather than the 8-9 that they were before,
but I am now routed differently from the exchange on g.fast
Out of curiosity where are you located? I wonder if you are going via the Manchester PoP or if they have installed a new hostlink in London yet.
My daughter is in the NW, so going via Manchester PoP didn't cause them any additional delay. DLM intervened at one point which did affect latency, but that's another story.
If you are in the South and they are routing you via Manchester then that could explain some of the additional latency.