People still talk a lot about about 2.0 adoption...as I always say, the point is not to have tools adopted but to build the ecosystem which makes them suitable. In other words that's not the individuals who refuse / fear / don't want / don't kwow how to... it's their ecosystem which makes very hard to develop.
Andrew McAfee published a very interesting note on that point, especially about the importance of the notion of time. In fact time is very well kwown excuse "I don't have time", "I want...