Helio, it might definitely be possible that he is indeed an Xer but there's also a chance that you have "TFT syndrome" ;-) (reading a person's personality traits as representative of a generation with respect to birthyear); not having met him I don't know for sure though
That's true, two people from different generations could say exactly the same thing and have it be interpreted differently based on their birthyear alone (kind of like astrology).
It might work like this: Take the statment, "The sky is blue."
Here's how it might be interpreted based on generation:
Silent: "I don't wish to discuss anything unpleasant or upsetting, so I would rather talk to you about blue skies."
Boomer: "The sky is blue, it is not any other color. I am right and you are wrong if you believe otherwise."
Xer: "The sky is blue, that's the way it is, deal with it, whatever."
Millie: "Look what a great world this is! Look at the beautiful blue sky! Let's all form a committee to talk about the physics behind what causes its color."