The bottom line: "We have everything we need on Facebook," says Gen Y CNET blogger Sharon Vaknin - though, despite an insightful post, she's pretty hard on her generation. First the numbers: She cites a recent Pace University/ Participatory Media Network study showing that 99% of 18-to-24-year-olds have social network profiles while only 22% use Twitter. Then she offers a little history on Gen Y's … [Read more...] about Why Gen Y’s not into Twitter?