It was a pretty cool clip. Haven't watched NOVA in quite some time. But I do have to ask:
This is news? (to the scientists or media?) If you have ever seen a dog that has successfully gone through Schutzhund training you know that dogs are capable of things that require fairly high intelligence. (compared to what the Nova clip asserts that scientists knew)
I have owned/seen extremely intelligent dogs, dogs with average intelligence, and dogs that were quite dumb. Some breeds are known for their intelligence, such as the border collie in the clip. Schnauzers are also known to be intelligent, and owning one, I can attest to that.
But pretty much every trick that you can teach a dog still involves repetitious memory. If you have the time and patience, and a big fat research check from some college (who got a bigger fatter check from the government), you could teach a reasonably intelligent dog to recognize hundreds of different toys. I've never really tried at all, but the dog we have who considers herself "mine", knows the difference when I tell her to get "her ball", "her baby", and "her toy". My son's boxer knows the name of probably 10 toys.
Did the dog pick "Darwin" due to reasoning? It appeared that he did, though we don't know if that was one of the methods used by the Ph.D. I'd say that some dogs are capable of extremely simple reasoning. But usually it is either memory or one of their senses. About 25% of the time, each of my four dogs understand what I mean when I am pointing at something. But I guarantee that if I placed some food under a cup, they would know which one it was under whether I was pointing at it or not and whether there was 2 cups or 20.
As far as "love" for a human, no animal gets as excited as a dog does when you get home, etc. I have to say that it is more than reflex or whatever. I probably agree somewhat with the scientist, that something happened during the domestication process. Though I do question that dogs are simply evolved wolves, having been around most of the different types of dog (working dogs, hunting dogs, gaming dogs, etc), I'd say that the evolution process was much more complicated than that.
It's weird, of our four dogs, one considers herself mine, two considers themselves my wife's, and the other is pretty much a family dog that we've had for over 13 years. But it is obvious that all consider me the "alpha male" and recognize my authority. (drives my wife nuts)
All in all a good clip. Wish I could get some of that cash to stay home and watch my dogs all day lol.