Google+ Plus Circles.

Latest web traffic tally suggests Google+ is growing fast..

Please read, Mr. Mark Zuckerberg, your “little Facebook” could be your worst nightmare.

Nielsen publishes its newest data covering the 2011 traffic of U.S. websites including the social networking sites, and unsurprisingly, Facebook is still the leader with a whopping 137.6 million page views per month, while Google’s blogging platform grabbed the second spot with 45.5 million — that is more than 50% lead.

Twitter is not the second most popular social networking site in the United States says Nielsen’s data, with 23.6 million monthly average page views only. WordPress.com takes the fourth spot, and the former giant Myspace landed 5th.

Predictable result, but wait.

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Please welcome, the gatecrasher of 2011: Google+ or Google Plus.

According to Nielsen, the five-month old social networking site is the 8th most popular in the U.S. with 8.2 million monthly average page views. Read it again, a five-month old website is already in the top ten most popular list.

Thanks to deeper Google integration, the new Google-flavored internet friending service is attracting millions of active visitors monthly.  Google+ could attract more users next year with the newest Android build, the Android 4.0 Ice Cream Sandwich which offers Google+ out of the box.

The Samsung Galaxy Nexus is the only Android 4.0 device in the market right now, but other Android manufacturers like HTC, LG, Motorola, etc are expected to release phones and tablets with the new operating system next year. Computer manufacturers like ASUS, Acer, Sony and others are also scheduled to release Android 4.0 tablets in 2012.

Nielsen also added that Google (the search engine) is still the most popular website in the United States with 153.4 million MA visitors, while Facebook takes the second spot with 137.6 million. If Google can maintain its monthly active visitors next year, then the Google+ subdomain could also attract more visitors  largely due to the “You” link located at the navigation bar of the search website.

Can Google+ maintain its growth next year?

According to Paul Allen’s data, Google+ surpasses the 62 million members mark this month, and if its growth will continue, then it could enjoy a whopping 400 million members by the end of next year.