"Is that statistically significant? I rather doubt it."<p>Well do the maths then? Since you read the Zed Shaw essay, you are now an expert on statistics, no?<p>Sorry to be cynical, but not ALL statistics out there has to be bad. I am too lazy to do the maths right now, but since you seem concerned, it seems fair to ask you to do it before complaining. For one thing, I think they have a fairly large sample, so maybe the 0.2 difference is significant after all (as I said I am too lazy to do the maths myself atm).