I'm in Ohio, but I only came to this area for forensic training. I did most of my interviews in the NJ/NYC/PA area for residency.
The specific program where the person made racial stereotypes, I don't know if the PD is still the same person, but residents at that program told me they weren't surprised. They said this guy had a habit of seemingly trying to get under people's skin to see the reaction. I will say it was in Philadelphia.
The program with the multiple choice test was in North Jersey (that narrows it to one of 2 programs for the curious!, there are now 3 programs in that area, but one of them didn't exist when I interviewed).
The program where the guy berated me, that one is in NYC. A good friend of mine did her training there. She said about 1 year after my interview, he approached a resident, yelled at him, and then grabbed the resident by the jacket and pushed him. The resident brought it up to the GME, and the department in response placed the attending in a research-only position where he had no exposure to residents. Other people I know who trained there said that attending was all about pimping.
All in all, with the knowledge I know now, I wouldn't have cared. I had multiple interviews. The first 15 minutes of the interview in NYC, I was somewhat perturbed, but then I thought about it, and thought to myself, "Forget it, don't even go to this program. Use this as an opportunity to practice for future tight interview situations. Let this clown bark all he wants, you have other options."
My point being is as long as you have several options, don't let this type of interview get you down. Besides, even if you do get this type of interview, the best way to conduct yourself is to maintain your composure and just go through with it while maintaining your dignity. If the guy's testing your ability to stay cool, then you likely will have passed the test. If he's just an A-hole who wants to ruin your day, well now he failed. Either way, you'll end up on top.
And remember, this was the minority. Most of the programs that extend an interview really want you to consider their program.