I think one of the real problems that doesn't get discussed very much is Google-envy. A lot of companies that don't really have problems like Google, and don't really have organizations like Google, and don't really have applicant pools like Google, will yet interview the same way Google does.

It really might be the correct way to interview for Google. Certainly they've put a lot of thought into how to manage their hiring process and they still lean heavily on the whiteboard. I'm almost positive, however, that most companies are really nothing like Google and really should not be using the same interviewing techniques.

Smaller companies with more quotidian problems would be better served with a more conversational and less time-pressured interview style.