Eh, it depends on the episode. Some of the time they're good about the statistics and doing their research, other times they're pretty lazy and just insert their own presumptions and preconceptions about an issue in lieu of a real debate. I'm reminded of their episode on circumcision, which was very one-sided (as all of their episodes are), but didn't even give a cursory overview of the opposing viewpoint to theirs. It's sloppy and unfair. It's like the movie "Idiocracy" or anything Michael Moore makes: if you already agree, you'll laugh uproariously, and find it brilliant and insightful; if you don't have an opinion, you'll probably see that it's biased and proselytizing; if you disagree, you'll see it as overwhelmingly unfair and silly.