I've had both residential and now business grade internet with Cox, and I've been generally happy with the service. It's been reliable, tech support when I've needed it has actually been helpful and on-site repairs are usually same-day or early the next day. The only real problem I had was when their repairmen mis-coded a service call and I got billed for it. But Cox billing fixed it right away.
So it doesn't surprise me that Cox is bucking the anti-consumer wave by challenging music industry subpoenas. And it's also good business, so they don't have a bunch of lawyers poking around their data, while paying their own lawyers to watch over them.