Absoulutely not all the time.....but I'll bet a great percentage of the time that happens. I'd say that usually, at least someone who is in a management position gets interviewed.
Is Leinwand still in management? According to the interviewer, he's a "team member".
I keep telling myself....deep breath....count to ten....try to answer without personal attack...if available, always try to present fact to back up your opinion.