I had TWC 20/1 and switched to Google Fiber last month. Big improvement with Ooma, especially while uploading a large file while on a call (even though giving voice priority on my router with TWC). No more choppy voice for the other end with other network activity. Google latency is also much lower than TWC, so much less lag.
Is strange that Google Fiber doesn't offer voice given they have their own voice service but Ooma does work great along with Google Voice as a call director.
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www.onsip.com/tools/voip-testVoIP test statistics
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Jitter: you --> server: 0.0 ms
Jitter: server --> you: 0.2 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 4.2
More here on Google Fiber...
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Review of Google Fiber by existenz