Towers of Midnight Textual Oddity

I've been listening to the audiobooks and came across what I thought was an amusing joke. Mat and Birgitte are talking about Elayne, and Birgitte says, "She has a death wish the size of your ego, and I mean to see she survives." To which Mat replies, "A death what the size of my *what*?"

So, it seems like Sanderson is making a joke: both "death wish" and "ego" are Freudian psychology terms, and one presumes that in Mat's time they don't have those terms, but that they may have been popular concepts in some of Birgitte's many lifetimes.

But then I looked up the quote in the ebook, and there it's, "She has a death wish the size of your pride, and I mean to see she survives." Now, this doesn't quite work anymore. He might not know the concept of a death wish, but he certainly knows about pride. I'm wondering if the audiobook was made from a non-final version of the text (it happens sometimes!) and this change was introduced after the audiobook script was delivered.

Anyway, just something I found interesting. And it seems like they edited out a funny joke. It's in chapter 22, or about 16:04:55 into the audiobook.