Ever been introduced as "the best" something-or-other? The smartest, the fastest, the funniest? It's a tall bill to live up to. And it can really ruin your image.
I've seen employers do it. They send out these overly effusive brag sheets that list the person's qualifications, starting with their perfect kindergarten attendance. Believe me, no one's record should be THAT permanent.
We all like the little buzz we get when someone says we're great. And we need that positive feedback. But ultimately, time will out. We don't need others to introduce our skills; they'll shine all by themselves when the time is right.