I don't know, I'd have the same first reaction. How many undergraduates even own a suit? I don't think I or any of my friends owned a suit until long after graduation.
Almost very undergraduate I know owns at least one suit... Granted, they're not all Armani suits, but I think you'd be hard pressed to find a second-year or higher student these days who doesn't have at least one suit.
I think it would be extremely easy to find. The only reason anyone ever buys a suit in the first place is to go on an interview for a ('real') job or attend a wedding.
Or a funeral, which is why I bought my first suit in college. College is prime-time for grandparents passing away.
Maybe. But I also feel like if you go to Harvard and have the ability to get an appointment set up by a friend of the family, you would maybe "understand" where they're coming from a bit more. (I use understand in the idea of recognizing that they're trying to emulate businessmen and treat such a thing as a business transaction.)
Although, I should remind you that this is Harvard, where the average family income is much higher than in general. That said, I'm assuming that the comment was not just based on the suits, but probably the attitude and manner that went with them.