Rob,
i just read your question again. You were asking about the version of NIV, not NWT. I am using a website (biblegateway.com), so I don't know what version it is.
Yes I agree. I very strongly doubt that the writers of ancient times (between 2,600 and 3,000 years ago) meant anything other than what is written. Irony and sarcasm are features of much later times.