Forrester Research surveyed 60,000 adults in the U.S. about the social sites they use, and 22% said they visit Google+ each month, which is the same as they got for Twitter, and greater than what they heard for LinkedIn, Pinterest, or Instagram.

This is one of the reasons Forrester’s Nate Elliott (yeah, the guy that said brands are becoming “disillusioned” with Facebook) thinks “every marketer should use Google Plus.”

“On average, top brands have collected 90% as many fans on Plus as on Twitter (In fact, the brands we studied have more followers on Google Plus than on YouTube, Pinterest and Instagram combined.),” he writes. “Second, and more importantly, Google Plus generates much more brand engagement than you think. Recently we studied more than 3 million user interactions with more than 2,500 brand posts on seven social networks. The result? Brands’ Google Plus posts generated nearly as much engagement per follower as their Facebook posts — and almost twice as much engagement per follower as their Twitter posts.”

You can find Forrester’s report on “The Case For Google Plus” here. It’s worth noting that this came out on March 31st, in case you’re thinking “April Fools’ joke”.

In fact, Shareaholic also released some interesting findings this week about engagement after the click. According to them, YouTube and Google+ are much better for generating on-site engagement than Facebook.

As brands grow increasingly frustrated with the way they’re being treated on Facebook. Networks like Google+ and Twitter are only going to look more appealing, and studies like these could just nudge some in the Google direction.

Images via Forrester, Shareaholic