Where does the "70%..." figure come from? It's not mentioned anywhere in the article. For that matter, the article itself throws around a lot of phrases like "c

Where does the "70%..." figure come from? It's not mentioned anywhere in the article. For that matter, the article itself throws around a lot of phrases like "clearly performing better", "proof", and "worst way", but the only evidence seems to be self-selected, explicit choice online polls?