[Mens Rea]

I don't really play that much limit anymore, but my comment would be that it takes a different type of skill for each game. Limit, in my opinion, requires mainly mathmatical skill, whereas no-limit requires more intuitive skill. I can understand why people would say that it is tougher to become an expert at limit. It is much more difficult for to be a "natural" limit player, while some personality types tend to give some new players an edge at no-limit, at least for a while.