My objection was to the notion that these are useful statistics for evaluating how many people are discussing the issues. Given how close the numbers are, given the proportionality problems, and given that for one of the numbers one actually gets fewer results (Postgender v. transhuman although that one is probably less of a good measure because postgender is also an adjective whereas the general adjective form of transhumanist is transhumanist), I don't think concluding anything about the size of the groups discussing it is justified from this data even in the weak way you have done so here.