The latest issue of Edge Magazine has an interview with lead game designer Jean-François Dugas, and a teaser of the article is online.
It appears Dugas has a few things to say about the first Deus Ex, and it's not all favourable. He claims that it was "kind of slow" and that "there weren’t enough exciting, memorable moments. It was aimed more towards a simulation rather than a game experience.” Understandably, the community is not too happy with his words. It is worth pointing out, as Kieron Gillen has done, that the teaser may not be representative of the full article, and that the tone presented online may not be the overall one set in the magazine.