And, the majority of those who go to CBC don't use the blogs. The comments are far more used and, since forums have been around much longer than blogs, I'd say that concept is probably better understood.

I was using XML (being an underpinning of how social media is glued together, and data transported between apps) simply as an example. I agree that you wouldn't try and explain XML to a newb.

In broad terms, I'd probably say blogging is known, but really not understood.