comScore recently released a first look at visitation to Google+. As of July 19, comScore showed Google+ at just about 20 million visitors worldwide, an extraordinary number in just its first three weeks. That number represents an increase of 82% from the previous week and 561% vs. two weeks prior. The U.S. audience recently surpassed 5 million visitors, up 81% from the previous week and 723% from two weeks earlier. For more insights on Google+, see the full blog post Google+ Off to a Fast Start with 20 Million Visitors in 21 Days.