This is just my opinion, I don't pretend to be an expert on anything. I think people tend to rate some breeds more intelligent because they are more trainable, more obedient and less independent minded. We had two German Shepherds before we got this crazy boxer and I will say that they were easier to train. I have never had a dog that was so eager to learn what you taught them. And as for obedience I have to say that of all the dogs I ever had they were obedient to a fault. If we told one of them to sit and stay I believe he would have stayed if the house caught on fire. But, I don't think they were any more intelligent than my SuzyQ just different. She has been one of the smarter dogs I have had especially when it comes to figuring out things for herself. She has happily learned walking on a lead and minor tricks as well as sit and stay, but sometimes when we make her sit when she would rather play or harass some poor guest she will also sit back and woo woo sass us, looking us right in the eye. Just like a child. Her sassy, independent attitude was one of the reasons I fell in love with her the first day we brought her home. For what it is worth, that is my take on the intelligence question.