ahupp - That is referencing the real time comments (where comments are pushed to you without reloading the page).

This is different. Facebook is showing the actual like count change in real time. This is fantastic feedback for big brands.

You might want to check the credits at the end of the post ahupp linked to. :)

"big brands"? What brand is getting enough traffic to justify the overhead of truly realtime like updates, besides Facebook or Zuck?