No. The closest to FCC cable modem regulation is that TWC must offer competing Cable ISPs because of the AOL/TW merger years ago. The Cable ISPs for TWC are atleast Earthlink and possibly 1 other company depending on market.
and nobody still knows the full details of that deal as nothing was released. And still in many areas you don't get a choice- especially in the markets that TWC took over from Adelphia and Comcast. You can go to Earthlink all you want to sign up and they'll tell you no service- and TWC will basically tell you the same- but why go with a 3rd party when you're limited to what speeds you're going to see.