Oh weird. I have never heard that. Well, none the less I still think its easier to communicate with my daughter than a dog. My family seems to get blessed with some of the dumbest over energetic dogs. The one good one we had lost a split second epic right against a speeding car.
I guess it just goes against my experiences to say that Dogs are as smart as a three year old. My daughter is very smart, and has quite a big vocabulary. She is working on small sentances, and posessives. I would just wonder what she will be capable of at three, and I cannot honestley see a dog being that smart. While I agree they will recognise several words, I belive that is simply part of thier survival drive. Who knows though, if you have any links to any good resources or evidence for your claim, I would like to read it. Not that I don't belive you, I am just a little skeptical to belive that.
