I'm not so sure that's the right presumption. Their online chat support only works on IE. IE only works on Windows. This could mean two things. They overlooked users of every other operating system. OR, and I think perhaps much more likely, those users don't need helpdesk style support.
Given that only Windows users need "help" using their cable modem, I think it only fitting that they not waste money making such support available to people who will never need it. Indeed, the far more perplexing oversight is how Time Warner thought it would be a bright idea to offer support for your Internet connection, OVER THE INTERNET.
Contrastingly, Time Warner Cable's online chat claims to support
Netscape and IE only, so far I've tried it in IE. So unless it really
works in Netscape, no cross OS, or even Firefox support. The
support-analyst I spoke with, they will be focusing on IE because
"Firefox does not come bundled with Windows, so we know that everyone
will have Internet Explorer" , which of course presumes that only
Windows exists.