There are games easy to learn but difficult to master that's true...but I don't agree with those exaples. Yes CS in my opinion is more difficult than UT (it's also a totally different type of FPS, not so easy to compare) but it's not like UT is easy to master, even after you have learnd the basics there's still a room for improvement (I'm talking about the first UT). Also I don't see how GT or Forza can be described as easy to master.
Mario kart is considered easyer because, if you take a noob, it's more probable for him to win a single race even if, in a tornament, the best player is always the one who wins while in GT or UT a noob would not stand a chance skilled players, even in a single race/deathmatch but In my opinion the same could be said for Melee and Brawl.
