I think the message of JTF is that all righteous people are on equal footing. In terms of intermarriage, I think Ruby summed it up very well, as Chaim has articulated that on several occasions. Anti-Semites have in the past accused Jews of proclaiming superiority to non-Jews, but I don't believe this is the case. Sometimes they have pointed to Jews saying they are the "chosen people," but this term does not mean Jews are better, it simply refers to G-d's covenant with the Jews. In terms of IQ, I have heard of some studies showing that Jews and Asians have the highest IQ on average. I'm not sure if I believe of any inborn advantages. I think it's a matter of application.