“I’m happy to announce that on mobile alone YouTube now reaches more 18- to 49-year-olds than any network -- broadcast or cable,” CEO Susan Wojcicki told a crowd of 2,700 gathered at the Javits Center in Manhattan for the annual NewFronts Brandcast extravaganza.  "In fact, we reach more 18- to 49-year-olds [in the U.S.] during prime time than the top 10 TV shows combined."