I have been going on the term, duan-wang (斷網), literally "severed Web," which has been used by media in Greater China (Taiwan, Epoch Times, Chinese exiles in Flushing, etc.) to describe the situation in Wuhan. Considering those sources, perhaps "cut off from the web" isn't necessarily the full picture but has little elements of truth to it.

"Duan-wang" had happened to Xinjiang during the riots 10 years ago. Back then, Xinjiang residents had much of their information cut off from the rest of the WWW and basically had access to only government-approved websites and internal sources of information. I can only assume that with the technology today the government can be much more selective in who has access to what kinds of web information.