I almost always get in the ~700-800Mbps up and down range on ethernet connections, regardless of time of day. Never had any issues during snow, rain, fog, etc.
My guess is that Google realized that fiber-to-the-home is the wrong strategy, and too costly, just as Verizon FIOS halted their rollout years before. And I believe even ATT only does fiber to a neighborhood and then coax to the home, right? It's sad to see, but the cost is astronomical and it's a lot harder to get cities/municipalities to let you dig things up.
Especially for America with it having so much sprawl, a wireless solution will probably work better and the rollout will be quicker.