While Frontier has yet to formally announce any gigabit deployment plans in the Connecticut territories it recently acquired from AT&T, attentive users in our forums note that the ISP has started marketing ultra-fast services. So far Frontier doesn't offer such speeds, but this "CTGig" website indicates that the option should appear shortly -- even if (like Frontier's gigabit offerings in locations like Durham) we're only talking about a few high-end housing developments.
Frontier's looming gigabit deployments would appear to be a response to bubbling over frustrations in the state regarding next-gen broadband (or more accurately the lack thereof).
Tired of the state's regional duopoly, the state earlier this year announced it was seeking a public/private partnership to begin building gigabit networks. The request for qualification issued is relatively ambiguous, but is only the preliminary step in exploring potential options in a partnership bridging more than fifty towns and cities.
Frontier recently announced that it has started providing some Connecticut customers with two new options: a 90 Mbps down, 8 Mbps up tier that's $55 when bundled with phone service, and $65 a month standalone. That's in addition to a 115 Mbps down, 12 Mbps up tier that costs $60 when bundled with phone service, and $70 a month standalone. The usual caveats about DSL loop lengths apply.
I've reached out to Frontier in regards to more detail about what's clearly a looming Connecticut gigabit fiber launch, but have yet to hear back.