I love this.
Most people don't enjoy being bragged-to, myself included. I had a coworker that bragged about how he was a part of MENSA and it was just annoying, and I didn't really know how I was supposed to respond to that. Like, good for you??? As you stated, very pretentious and shows a lack of self-awareness.
That being said, I think in SOME cases, people who feel under-recognized and under-appreciated might go fishing for compliments/recognition by way of bragging, and it comes off as obnoxious, but really they're just starved for some assurance and recognition. I think we all want someone to affirm that we're smart people sometimes, haha.
Anyway, great article.