Over the years Massively has played in MMOs, they have seen a lot of the social structure changing. They don't think it's entirely just their perception - it's more a process of the games changing as well. In EverQuest for example, getting to endgame (at least without lots of death runs) involved grouping. In contrast, you can solo from 1-80 in World of Warcraft without ever having to group up once. While this has opened the genre up to lots of new players who normally wouldn't likely have played MMOGs, some might say it's also taken something away.