The emphasis he places on the students' attire is that they begin building the correct wardrobe now. We advise them to invest in one good quality outfit. We may see them in that outfit more than one time, but the initial recruiter is only going to see them once. It is highly recommended that you get as much information about the prospective companies as possible before your interview. This includes information on the corporate culture and how people dress.
Proper presentation takes preparation and knowing the rules of the game.