Hmm, so to clarify, when I speak of levels, then I'm mostly thinking of "a location you will see during one mission, and then won't be able to go back to".
I don't know, think of Thief 1, Thief 2 or Dark Messiah. They had levels, then cutscenes, then more levels. However, the levels themselves were very open - if I had to guess I'd say that Thief's levels were about as big as some of the hubs from Deus Ex HR (they certainly seemed that big to me).
But I really don't know, maybe they'll do hubs. It just didn't sound like it. It sounded like the game was a very linear experience where you go from level to level and fulfill missions. (Which I like, by the way. If the levels themselves are worth repeating and there's lots of different ways to beat them, that's more than what most games can claim nowadays.)
I see, I wouldn't mind that either, but on the other hand I demand a 25hr campaign

, No really I am tired of 6hrs games, and Stealth games are the most games I love since I can take as long as I can playing them without getting bored, especially with a challenge like in DE where you need to finish the game without raising an alarm combined with pacifist.
Yet from where I see it, it seems very HUB material to me, and I feel there is little exploration, I don't know maybe since I recently played DE:HR it is clouding my thinking, I will try to look at Gameinformer's articles again.