Anyway, this guy was frank enough with me about that stuff, that I actually believe him when he said that all those bad articles about amazon's culture (which had just come out weeks prior at that point) were probably accurate for some parts of the company, but he had never encountered it.
I didn't end up getting an offer from them ( I wouldn't have hired me based on the tech interviews either. Every single applied programming problem was some form a tree traversal, which I don't use regularly anymore) and was a little relieved that I wouldn't end up working there.