Facebook dominates the market, which shouldn't suprise anyone. YouTube has a little more market share than I would've guessed, but it makes sense. There are a few things here that surprised me:
- MySpace still gets WAY more traffic than I thought
- Twitter gets WAY less traffic than I thought
- There are a couple of sites listed that I've never heard of (Tagged, MocoSpace)
- LinkedIn isn't mentioned at all
Top 10 Social Networking Websites & Forums - May 2010