Greenstein - Good Article.

[Snoogins47]

"never the less... i still think that a successful career tournament player at a given buy-in level is more skilled than the equivalent limit cash game player, assuming that they end up with equal ROI. in other words, it is harder to maintain long term success in tournaments than in cash games at the the same $ level. "

A sound set of reasons as to WHY you think this would go a long way.

I think a lot of the problem actually is thus: even if consistently turning a profit in MTTs was equally as hard as it was in Cash Games, there would still be a subset of players who had won large amounts of money who were weaker players, or even losing players. This sort of thing is almost unheard of in cash games.