Who participates in social media? [chart]

This is not the first chart I've seen presenting such data, but it is the most effective. (From Businessweek. Hat tip: FlowingData)



Some observations:

-- 2.3x more people aged 18-21 create content than collect content (e.g., RSS), while 2.2x more seniors collect than create.
-- It is bizarre both how few "collectors" (RSS users) there are and how flat is the distribution. I am shocked that young teens (ages 12-17) collect at the same rate as seniors: 11%.
-- I am surprised that young teens participate less in social media across all categories than people ages 18-21.
-- The proportion of creators ages 12-26 bodes well future spectators.