IMO Facebook is not in any great danger from Google plus. Smaller start ups maybe, but Facebook has the not-tech-savvy market by the balls and google plus certainly isn't going to take them away. My brother, sister and father all use Facebook, none will be switching to google plus unless all their friends do, their friends won't switch unless their friends do... the Myspace/Facebook comparison doesn't work either, a large portion of Facebook users now didn't ever use Myspace, it's not as if they've moved away. Myspace was popular in the era where social networking was for teens and "nerds", Facebook rose to popularity when social networking was for everyone, google plus can't just waltz in and take all those users. Google plus is just another tech industry circle jerk, it'll be a long time before it ever comes close to harming Facebook (if it does). How many people are using google plus and not Facebook? That's what matters most. Everyone I know who uses google plus (which is a small group) is still using Facebook.