Rubbish. Firstly, it took everything that made Deus Ex great and either shat all over it or dumbed it down into oblivion. For example, the horrible unified ammunition system, the lack of any consequences for anything you did (You can massacre *every single* NPC in the game without consequence), the tiny cramped level design (Compare the multiple paths, secrets and such of Liberty Island in Deus Ex to Seattle in IW) and so much more that went wrong with that game. It was sequel in name only and an inferior game to the first in every respect.
This is rabid fanboyism. It was a good game unless you insist on making comparisons to the first. Taken on its own and without expectations of it being like the first, it's a good game.