would be if I took an IQ test and was given a score significantly below what I expected...
This, BTW, has happened to me.
It served to significantly change my self-awareness, lower my level of pride, and made me have a little more appriciation for the opinions of others... who were not quite so dumb compared to me as I had thought. (perhaps this is not a perfect comparison, since I'm still a MENSA member... and I didn't squeak by to get in, but...)
It wouldn't be saying (in the rediculously improbable hypothetical case) "you're a moron", it would be saying that ON AVERAGE, a member of one group has a slight advantage or disadvantage over members of other groups... The distinction is clear - in your case you presuppose the information would serve as a means for making members of the group give up on their possibility. In my case, I believe that information would tend to encourage them to work harder "you have a disadvantage" always served to encourage me to work harder, not give up...
Perhaps the best analog would be that of divulging health information to patients... In some cases the knowledge would cause them to try to improve their chances, in other cases it would force them to accept their possibilities... but in all cases it is KNOWLEDGE... That shouldn't be suppressed just because it MIGHT make somebody feel bad.
Of course, the entire argument is purely abstract, since we both agree the likelihood of any serious study coming to such a conclusion is near 0... which means the study will almost certainly serve to end the debate and confront prejudism with certain evidence.