In total, the stat tracking service now estimates that Twitter reaches more than 14 million people monthly in the US – and that’s just on its website and doesn’t include third-party clients like TweetDeckTweetDeck reviews[img src="http://static1.blippr.com/images/inline-face_05.png?1237798206" caption="" credit="" alt="TweetDeck reviews"] or TwhirlTwhirl reviews[img src="http://static1.blippr.com/images/inline-face_05.png?1237798206" caption="" credit="" alt="Twhirl reviews"].
Meanwhile, FacebookFacebook reviews[img src="http://static1.blippr.com/images/inline-face_05.png?1237798206" caption="" credit="" alt="Facebook reviews"] posted huge numbers of its own in March, growing 23.4 percent month-over-month to more than 91 million US visitors. That represents nearly 200 percent annual growth, and, given its size relative to the much smaller TwitterTwitter reviews[img src="http://static1.blippr.com/images/inline-face_07.png?1237798206" caption="" credit="" alt="Twitter reviews"], is also extremely impressive.