In terms of sheer connectivity, it’s hard to outdo millennials. The demographic has taken to the always-on, always-connected way of life in dramatic fashion, as evidenced by the November 2012 Scarborough Research report, "OMG! Is Your Medium Reaching Millennials?" which surveyed 210,000 US consumers ages 18 to 29.
via Millennials Keep Connected on Ever-More Devices – eMarketer.