Our house has BT and we have the Infinity option which is fibre optic cable, it's brilliant. 35-40Mbps which is really good considering when we were with Talk Talk, the speed was not even 5Mbps
Time Warner and it SUCKS. I've had flop ass LOCAL internet companies in places I used to live. I've had comporium, windstream (the local ones) then AT&T and Time Warner. TW is the worst.
Bell Canada. It's pretty good (much better than the trash that is Rogers) but sometimes gets a bit slow b/c our tv service is also with them and runs off the wifi.