Ah, the tricky business of interviewing. It is difficult in any field, as both the interviewer and the interviewee.
The person doing the interviewing has the challenging job of balancing selling the position and assessing the skill-set of the potential employee.
And, well, we all feel for the potential employee. Who hasn’t arrived way too early for an interview only to sit in your car for twenty minutes until you’re ‘appropriately’ early? Or, who doesn’t leave an interview and then just play the discussion ad infinitum for the foreseeable future?