US Most Visited Top 10 Multi Platform Social networks : Google + inches ahead of Twitter

The above chart  shows data on the top 10 most visited social networks in US  across cross platform devices including browser-based visits across personal computers, tablets and mobile phones
Facebook forms 55.2% of all visits to social media websites in US,followed by Youtube with 20.7% Americans logging in via their smartphones, Tablets or PC/Desktops 

Suprisingly Twitter  is loosing out to Google Plus in terms of online visits as  Google + 4% share  to twitters 2.52% visits. QA Community site Yahoo Answers is visited more than Linkedin( 1.45% vs 1.38%), followed by Pinterest 1.12%