Google is excited by the latest numbers coming in from Google+. It seems they have managed to sign up 400 million users in just 12 months, something Google never expected to happen. They also are celebrating 100 million "active" users, though their method of calculating active Google+ users is a bit wacky.

"It was only a year ago that we opened public sign-up, and we couldn't have imagined that so many people would join in just 12 months," said Vic Gundotra, senior vice president of engineering at Google, in a post. "While Google+ is all about creating a better experience across Google, it's also a destination."

The way Google calculates users of Google+ is a bit skewed. Basically, if a user signs into a product related with Google+, such as YouTube, Google Play, or Google Search, they are counted as an active user. So even if they aren't using any Google+ features, they are still counted as an active user.