google fiber is going to be interesting - I really do hope it is as good as it sounds. Is google actually running all their own fiber, or are they using local loops from other providers? I did see some early test results that really weren't all that impressive. http://gigaom.com/2012/07/31/google-fiber-in-the-real-world-heres-whats-good-and-what-needs-work/
The guy in that article is clearly fairly clueless about networking technology, but the speedtest was interesting. I hope they can do better for you than 180 down/45 up with a 39ms ping!
Well, Speedtest.net (or any except Google's for that matter?) isn't yet optimized to handle gigabit speeds, and the limits of the Wi-Fi, and the limited upload speed of the website you're visiting all come into play, and maybe he didn't think much about the latter one. If it goes Website's Server>DNS Servers>Your Computer (I don't actually know the exact route but I'm pointing out the middleman) then even with a gigabit connection things are going to be a bit slower than expected because the Wesbite's Server>DNS Server could be slower than the DNS Server>Your computer, so when I get it I'm judging the improvement over my normal 12mbps Uverse connection, I'm not going to whine about how long a song takes to download etc.
Basically, you shouldn't expect virtually instantaneous responses and load times but it still should be a hell of a lot faster than whatever else you were using before. Like if my HD YouTube hiccups on a video that isn't getting high traffic (estimated with the amount of views and how recent it was etc) then I might raise an eyebrow. I've watched a 720p video with no buffering and gone to another 480p video and it takes 15min to buffer (the 480 not being any longer than the 720) before though so you know, anything could happen. That 480 video was a recently uploaded (within minutes ago) video and I moved down from 720 to help load times but was unsuccessful, that's what I mean by traffic. Over 300 people trying to watch it at once before Google has the chance to copy it to other servers to serve multiple streams at the same time seems to slow things down.