I'm sorry, I should have been more clear. I meant "I've never heard of that method, so I looked it up in Xcode and it turns out it is not a method on NSString (and why should it be if !isEqualToString: achieves the same purpose?) which leads me to believe that this comment is sarcasm, if it isn't can you please clarify?"
I'm not saying the example is correct, I'm pointing out that "I've never heard of it" / "Works on my computer" are dangerous attitudes to have.