This image shows how long it takes to reach the first 10 million users for Twitter, Facebook and Google+.
Google is one of the most famous companies in the world and maybe the most famous tech company ever. If google is launching a new product everybody wants to try it. Some of my Facebook friends moved over to g+ because it interacts perfectly with all other google products. But this friends are still active on Facebook.
Some people are using g+ just because they don’t like Facebook. If you don’t like Facebook and you are looking for another social network, than g+ is of course perfect for you.
The time will show if Google+ is a trend or just a hype.