For people to claim they were replicating the 9/11 events is utterly ridiculous and is just another example of you can't make ALL the people happy ALL the time..
Honestly - given the number of architects I've known - it wouldn't suprise me at all if someone actually did have a goal of making it look like the twin tower explosions. Some of them are a bit...off
For a tall building, the design is unique and quite refreshing, and a nice nod to the urban designs of Moshe Safdie [edit to contribute some architectural design history].
Eh - I think its a rather poor attempt. His designs were so much more striking. Either they all conformed to a unique structural design or there was a single striking element interwoven/linked to a base structure. You could argue that the latter is somewhat the case but if you look at Moshe's designs I am not aware of any that would be joined to a rather boring tower.
(While its a bit hard to tell they look like your normal everyday boring rectangles)
Edit: Damn I am spending too much time thinking how I would tweak their design....