Indeed it would certainly make me not want to apply to the position. In my experience it is hard enough to maintain adequate professionalism in the 20 something

Indeed it would certainly make me not want to apply to the position. In my experience it is hard enough to maintain adequate professionalism in the 20 something caffeine crazed all nighter atmosphere of a startup. If it can't show a modicum of it in its official communication, I can already see the scenes in the office. Also: I would try to hire flowgrammers because you know they are always in the zone. EDIT: Make that flogrammers