It seems most of his analyses are on political opinions, not on matters of fact. The one exception seems to be on the existence of God, where the smart vote was on agnosticism, which is not exactly "politically correct", but would signal intelligence.

Now, some of the political positions are PC, such as support for Gay Rights, for Immigration, and opposition to Death Penalty. The position on welfare state seems very un-PC, though ("doesn’t think is really a state responsibility but is not opposed to some welfare spending so long as the country can afford it"). The total support for abortion doesn't seem PC at all either, at least it isn't in Brazil.

It is important to note that those people were answering a survey, so signalling isn't that strong a factor as it would be if they were talking of their position to, say, their work colleagues.