I'm on the Conversations tab on the home page starting a discussion. I believe all the green Blogs are in the left column and everything else goes to the right column. looking at the time stamp (of both columns) gives an idea of current real time activity.
Note: my last 4 blogs on the left are part of this testing stuff. That's it for me today. I think I learned a little bit, and hopefully helped.
I know the Publish Location is pertinent as to whether it shows up on the home page in the left or the right column, I also believe the time stamp is intermixed between the two columns.