Although I do enjoy reading your posts, slader, I do find it strange that you, basically, compare chpaters (acts, parts, name what you like) of Tales of Monkey Island with full games. Considering that ToMI is not just a simple sit-com episodic game, but a normal full Monkey Island game with several, as usual, chapters/acts/parts, just released monthly.
How about, for the sake of experiment, you take all those different chapters of all monkey games, and rank them, well, separately? It will be only fair to ToMI. And then, after all five episodes are released, you can judge it as a full-length game along others. I, for example, would rank SoMI's Part II: the Journey, higher than any of ToMI-episodes so far. It's short, doesn't have much dialogs, but it's a little masterpiece of it's own, I suppose. The atmosphere of a sea journey, just walking around the ship, and what not... it was great. And yet, let's say, Parts 3, 5 and 6 of Curse of Monkey Island are FAR below ToMI chapters so far. Far-far below. For me, of course.