Kreation's Edge on character advancement systems

Vajuras from Kreation's Edge has a huge Treatise on Character Advancement Systems, listing many advantages and disadvantages of class based systems and skillpoint based systems. It is biased towards skillpoint based systems, but otherwise a very good read. My only complaint is one of semantics, he calls the skillpoint systems "skill based systems", which is misleading. We aren't talking about player skill here, but about avatar skill points. It is perfectly possible to make a skillpoint based system which doesn't need much skill to play, there is no advantage here over level based systems. On the other hand I still get annoyed sometimes when people in level based games think that they are more skilled than other players, just because they have a higher level. Somebody having killed Illidan is only proof of a high degree of determination and time investment, which isn't necessarily the same as "skill".