I've had one interview to date and a 2nd in a couple days. My first was way less stressful than I expected. I really enjoyed myself! In my opinion, it is so hard to tell exactly "how it went" in terms of likelihood of an offer...just because everyone is so qualified and (for the most part) cool and personable. I will be devastated if my interviews lead to 0 offers, but it is nice to know that at least the competition is fierce and I can see how faculty members have very difficult decisions to make...