It is annoying, only because it is obvious tabloid-level gossip and has nothing to do with the events involved. We should be talking about the Canadian start up scene, Waterloo in particular, not this guy's age. But something tells me something about his age is the reason this got upvoted so much.
Age is no different then skin color, marital status, or any other attribute you could assign to a person. I always (try to) by default ignore it from headlines and articles.