That won't work here in SW Ohio. TW's only competition is DSL from Cincinnati Bell, which TOPS out a 4-5Mb down/768 kb/up. They DARE you to cancel.
There's one thing you have in your favor. Cicinnati Bell's 4-5mb down is more reliable than TW's 10-20. That's the bargaining chip you have. I use it in my favor. You can too, I'm sure.