Nothing official, but the boss sure seems to have decided. CTO Ibrahim Gedeon spoke twice at Huawei's MBBF in Tokyo. It was a mobile event but G.fast was part of both of his presentations. It's a natural extension to Telus' fiber deep network. He used VDSL to bring video speed service to many homes and fiber home for others. He faces cable almost everywhere and will need to upgrade as Canadian cablecos move to a gigabit. (Videotron in Quebec is already offering gigabits. The cablecos in Telus' Western Canada region will be doing similar.)
Fiber home is working well but is costly. His estimate was $700 to connect a home and sometimes as much as $1,000. (Presumably, he was quoting Canadian dollars, currently worth 25% less than U.S. dollars. $700 Canadian is a little more than $500 U.S.)
A while back, Verizon estimated $600-$700 (USD) to connect a home; they've said it has come down substantially since then. Randall Stephenson of AT&T has confirmed fiber deployment costs have come down substantially.
All figures like this vary widely by local circumstances, so are never exact. Accounting choices, such as how much overhead to allocate, can result in 30% differences in two estimates based on identical data.
G.fast eliminates much of the cost of fiber home while delivering 500-800 megabits 100 meters from fiber. That's especially true if the customer self-installs, although that can often result in lower line speed. The savings can be so substantial that over 60 telcos are testing G.fast just with Adtran. At least 15 are already in deployment. Others are waiting for new equipment that supports vectoring 64 or more lines, rather than the 24 that is the maximum today. Vendors promise delivery soon.
I hope to have official word soon.