In addition, wasn't there some hoohhaa about the orginator of the IQ test faking his evidence by making up sets of identical twins?
I think it is very important to talk about issues of race, gender and faith differences without shouting or letting some politician hijack the debate.
It is true that the results of all kinds of research get either twisted or suppressed to suit political aims, and that in other cases 'research' is skewed to add credence to political ideas.
Culture has to play a role in IQ testing as the tests contain intrinsic cultural bias - for a starter , the notion of taking a test is culturally specific.