I was watching the CSPAN comments because people were talking about it, and yes, the comments were quite positive.
It's possible that the campaign is now getting people on tv. It something that a political campaign can do, tell campaign workers to call CSPAN, get them with the message. I have no idea if they're actually doing that, but it wouldn't be unreasonable to think that they usually aren't trying to get on CSPAN or somewhere else, but now they are.