PALO ALTO, CA, Feb 09, 2012 (MARKETWIRE via COMTEX) -- ShareThis, one of the largest platforms for sharing across the Web, today announced the appointment of Paul Lentz as Senior Vice President of Publisher Platform. ShareThis reaches more than 80 percent of the US population online(1) across more than 1.3 million websites, and has built its business around the content that inspires sharing and the audiences that socialize it. The company's platform drives economic value for the entire online content ecosystem with innovative products such as the Social Quality Index, a new methodology to measure the social quality of sites across the Web siapanya