I have not been in the job market for over a decade (and don't plan on being in it the short term either), but we're interviewing people for entry level design and drafting positions at our firm and I'm mystified by something.
Why do people show up half an hour late dressed in casual clothes for a job interview? Has society changed so much in the last 10 years that you no longer need to dress appropriately and show up on time for an interview?
About 11 years ago I remember sitting in my car, dressed in my suit, half an hour early for my interview, nervously waiting for the appointment time. I remember even taking a drive a few days earlier on the weekend to scope out the place so I'd know where it was, where I could park etc. I didn't want to get lost or have to walk 5 miles and be late for that interview.
Overprepared? Maybe. But the last few people I've seen come by here for interviews have been late and are dressed pretty shoddy. We work in a casual dress environment (think golf shirts and khakis), but this is a job interview - aren't you trying to make a good impression?
I'm not the one doing the hiring so I can't really speak to their experience or skills, but man, these people don't look like they're trying to impress anyone. At least they're achieving that.