There is this thick layer of traditional leadership at the top levels of organizations. They hear about networks & social media but have "no time" to experiment this by hemselves. Therefore they still think it's a kind of fad for not-so-busy people ; nothing that really justifies changing their organizations' structure, processes, habits, cultural references. They hire people who think alike and don't challenge them. So, what do we do? Wait until those people retire, and till then experiment under the radar screen? Or what...?