Perhaps it is that I spent my entire career in start ups (and in post exit companies that aren't quite startups anymore) but, I would disagree with both of your

Perhaps it is that I spent my entire career in start ups (and in post exit companies that aren't quite startups anymore) but, I would disagree with both of your thoughts. I have never taken an "how to give an interview class" although I think I got handed a packet once. Also I'm glad I didn't have to go to some interview training class, it would be written by some HR person that doesn't have a clue. The legal stuff is already well-handed by the standard HR (don't be an asshole or racist, or sexist, etc) training. In every team I have ever been in, the interview responsibilities rotates through each team member, even newer ones unless they are maybe recent college grad super greens, then they would still go but maybe have somebody else sit in. In the small shops places, everybody interviewed each candidate. This actually makes a lot of sense as the candidate is potentially going to be their new teammate and member of the work community and it makes sense to give the people that will be day to day with this person input on the hiring decision.