I guess one question we would need to look at tonington, is what's the key difference between intellect and cognitive ability. By focusing on the term 'intelligence' Watson automatically sets up the issue as being one where someone WILL come out lacking, rather than an issue where people come out with different strengths. I can see where that is an automatic road block to wanting to hear what the man has to say.
This isn't something new to Watson's studies. Here's an excerpt from Time magazine in 1970 on race and IQ:
http://www.time.com/time/magazine/article/0,9171,902708,00.html?iid=chix-sphere
I don't see why what Karrie is saying is so hard to grasp. The human groups would have developed skills unique to their circumstance, and there is no reason to be skeptical that certain cognitive abilities would be better suited for survival in different conditions, and therefore have greater allelic frequency. As Watson said, that will have to be dealt with. Although we have a mapped human genome, we are far from knowing what the map says.