PR’s heavy hitters aren’t embracing Twitter

This one is confounding. Powerful people in PR are, in some cases, absent entirely when it comes to social media. In July, PRWeek released its “Power List” of the industry’s top 25 professionals. Less than half of them have a Twitter account, reports the PR 20/20 Blog . “Of these 12,” writes PR 20/20 , “five have never posted a status update; four of those don’t have a photo for their account; three don’t have bios; one protects his tweets; four tweet on oc…