My pecking order will only consist of social media outlets I use, feel free to rank or insert others if you use them as well.
Twitter is 140 characters, succinct, quick, blurb-driven for fast attention of lots of people
Facebook, three times as long as a tweet at 420 characters, allows for more expounding, but only seen by people you a) are related to b) are friends with or c) you knew in high school and probably wish you hadn't found on Facebook (those you are glad found you or vice versa go in category b)
Blogging is unlimited length, but you lose readers quick. It is a way to rant and rail when you can't do it in short order.
That's my take on it anyway. When I went to tag this post one of the recommended tags was "Chicken Coop" so I added it. Not sure why WordPress suggested it, but fire in the hole!