Two slides in particular really struck with me:
In my experience as both an interviewee and an interviewer, all of these points are 100% true. Usually, about half way through my job search, I'll feel worthless and stupid, sure that no one will ever hire me. I've had an interviewer interrupt me midway through a white boarding problem and tell me that I wasn't quite the level they were looking for. Could I do the job they were asking? Definitely. I know I have routinely performed well in every job I've been given. However, white boarding routinely terrifies me and I've only gotten slightly more relaxed the more I've done it. I've always done better in a pairing session or, heck, just coding on a laptop in front of people. I've seen people hired through whiteboard interviews who are not good at their jobs. Zack has some good suggestions on how to improve the interview process that I think everyone should take into consideration.