Funny article/finger wag/smear piece. Judging your customers is definitley contrary to good business principals. Perhaps, though, Prime Meats has a "reputation" to maintain.
In the big picture, this probably says less about an emerging cocktail culture, and more about a persistent jerk culture. Ironically, there are plenty of places in the PHL/S.NJ region where you'd get a lot worse than snootiness for ordering a "proper" cocktail.