In the Bay Area (Palo Alto) you can get 1 Gbps Comcast service and it works well, but getting it is hard because everything else about Comcast is bad. - It's hard to order the service because the price online is a stupidly high price no one should pay if it's listed at all. - When you call two thirds of the sales reps don't know what gigabit is and will tell you it's not in your area (even though it is) rather than f…
In other words, you're allowed to use your service for about three hours per month.
I worked for an ISP and I completely understand the idea behind overprovisioning, because you build your network for average traffic and not the maximum theoretical capacity needed to serve 100% of customers using 100% of their connection 100% of the time. But here Comcast is overprovisioning by a factor of 240:1 -- that is, you can only use your connection at 1/240th of your theoretical capability. That's insane, and demonstrably unnecessary.
I use Sonic.net which is a relatively much tinier ISP, but who offers uncapped gigabit for much less than Comcast's capped joke offering. Therefore, people who really want to use their connection heavily are much more likely to go to Sonic.net than Comcast, meaning that Sonic.net probably has a much higher average per-customer usage than Comcast does. And yet, they're still cheaper, still uncapped, and still growing. If Sonic.net can do it, Comcast is just being greedy.