Re: fibre
"so their latest & greatest FTTP is 300Mbps DL + 30Mbps UL (less contention). Not sure what "long twisted-pair runs" have to do with measured speed across a fibre link"
The article has combined two different products.
g.fast, the 330/30 Mb/s one, is a souped-up VDSL FTTC service, hence the bit about long cable runs. It's fibre to the local cabinet, then copper wire to you.
It then starts talking about fibre-on-demand, which is FTTP with the high install costs because you have to run a fibre cable to your house. If I've read Google right, fibre-on-demand extends the fibre cable from the nearest FTTC cabinet to your house.