I can say first hand, that if you call your ISP and say "I'm switching to X service at $Y for Zmbps" you can get your bill reduced.
Except if you're one of those millions that live in rural areas with only one ISP.
Or if the major ISPs in your area are complicit in keeping prices up and enjoy a pre-arranged share of the market each.
Rural areas and complicit ISPs suck for internet service.
My statement only makes sense if you would actually go through with the threat if they didn't reduce your bill
I was primarily refuting your "causes isps to lower their prices" because Google fiber has done NOTHING for TWC's marketing. It's still the same terrible prices.
The way customer service works (again in my experience) is that you'll go through several people before you get to someone who has the power to change your bill.
It's a needlessly involved process, but it is an option in some cases.
The original comment was regarding Google Fiber's effect on competitors. If you're in an area that can get their service, then you should be able to back up your threat.
Either google fiber is faster and cheaper than what you have now, or it's not and what you have now is better.
You would think the OP area of KC without Gfiber would be the one area trying to 'make nice' with people offering better service, discounts, and/or promises, but there is absolutely zero signs of 'competition' in the market.
As a KC resident, TWC has not yet reduced my internet costs or increased speeds.