This is old news for veteran bloggers, but I was just curious about my contribution to the Huffington Post Divorce section on the Divorce Research of 2010 and the comments.
The article was posted at 3:23 am, Dec 28, 2010. By Noon that day there were seven comments.
Here are the number of comments between Noon - 8pm that day
1 pm 38
2 pm 52
3 pm 35
4 pm 22
5 pm 17
6 pm 8
7 pm 11
8 pm 5
Between 9 pm and and 10 pm there were five more comments and then between 11 pm and 1 am on Dec 29, 2010, there were 25 comments In the 48 following hours there were 4 additional comments.
This does not mean that this contribution is still not being viewed (I don't have access to these data.), but it does mean that at least in this particular case, the commenting on this post lasted about 12 hours. I am sure that the Huffington Post has more data about the pattern of comments, the demographics of the "commenters" themselves, but this does give you a feel for the brevity of the life of a discussion on the Huffington Post and probably many "news" sites.