You bring up some good points.
We do indeed need to look at some other data to see whether women are more gender-biased than men or whether blacks are more race-biased than whites.
Barring a more in-depth study, one data point could be the fact that women and blacks turned up in much higher numbers than their percentage among the general population.
For example, according to this website blacks in PA are about 10% of the population, whereas they accounted for about 15% of the voters in yesterday’s primary.
And given the historical tendency of blacks to have a lower voter turnout than whites, this indicates that, for this election, blacks are very motivated to come out and vote for their guy. If they did not have the notion that “finally, we can elect a black person to the presidency”, but only had the notion that “this candidate is better than the other candidate”, I don’t think that would have been such a strong motivating factor in getting out and voting in such record numbers.
Similar observations can be made about the women who accounted for 59% of the votes in PA, whereas I assume they arfe just above 50% in the general population. However, after some searching, it seems women have tended to have a higher voter turnout than men in the past few elections, so the effect is not as strong as for the high black turnout this year.
Besides the raw data, my idea of how people would think in these situations is what made me state in the OP that the data shows bias.
Basically, it seems to me that since white males have had “their type” of candidate elected to president for the past couple hundred years or so, they don’t care as much whether the next president turns out to be white or black, or man or woman. What’s one more?
For women and blacks, who have never had “one of their own” as president, it matters a lot whether the next one is a woman or black. It would be a landmark event, and so it makes sense that they might forgive some policy issues of that candidate, just because the candidate is female or black.
So, it makes sense that women will be more gender-biased and blacks more race-biased, in this particular election, compared to white males. I don’t think there is anything wrong with that, it is simply human nature, no matter how enlightened we claim to be.
I am a white male, and I think that if either of them becomes president that would be great. We either get the first female or the first black president, and I think that would set a great precedent for future elections.
I am more-or-less indifferent between the two. I would just like the person most likely to defeat McCain to win.
If I were female/black I think it would take a very incompetent femal/black candidate and a super male/white candidate to convince me to vote for the latter candidate (in this election; as more female/black presidents get elected, by bias would reduce)
As it is, the two candidates are very similar in competency and policies, so personal biases will definitely play a huge role.
Anyway, going back to the issue raised in the OP, I see the point that, given the available data only, we cannot conclusively state that women or blacks are more biased than men or whites.