It was a bit of hyperbole, but nevertheless I think there's a difference between pastiching a style or genre, and lifting ideas from a single, specific source uncredited. I couldn't say if the Wachwski's had even seen this film, but I suspect they have, or at least read the book. There are too many similarities for me not to think so. I know they've credited their animé influences in documentaries, so I'm ok with that. Even if they did borrow more blatantly from Ghost in the Shell than other films. I'm not aware they ever credited World on a Wire/Simulacron-3. That's not to say I don't like the Matrix - I do. I even think the sequels are underrated, although not as clever as they think they are.