Re-posting from Care2.com's blog,
frogloop:
The U.S. Population Does Not Spend Their Day Using Social Media
Guess how much of the U.S. population (comprised of 311,446,341 people) uses social
media these days? The stats may suprise you.
Twitter: 1.1 % of the U.S.
population is on Twitter. (source: April 2011 results from Experian Hitwise.)
Facebook: While Facebook says that they have 150M U.S. “active” users,
which is 48% of the U.S. population, only 50% of active users login any given
day. So 24% of the U.S. population logs into Facebook on any given day to check
or post updates. (source: Facebook)
LinkedIn: 0.37% of the U.S.
population is on LinkedIn. (source: April 2011 results from Experian Hitwise.)
YouTube: 19.94% of the U.S population is on YouTube. (source: April 2011
results from Experian Hitwise.)
MySpace: 1.19% of the U.S. population is
on MySpace. (source: April 2011 results from Experian Hitwise.)"
Holy moly. 1/4 of Americans check their facebook page EVERY DAY. That's actually pretty revolutionary when you think about it, especially when you consider how relatively new the site is in the grand scheme of things.
Still, 75% of Americans don't check it every day. And 52% of the population aren't on it at all.
It all goes back to who you're trying to reach. If you are looking to highly educated, computer saavy individuals, it's probably still worth it log on and spread the word, but only as an augment to other strategies.