I'm assuming there is a filtering function occurring at HN which means that high quality sources are being linked to more often than low quality sources. I thin

I'm assuming there is a filtering function occurring at HN which means that high quality sources are being linked to more often than low quality sources. I think that's a reasonable assumption, and is why WSJ is getting linked to a lot here. It's also pretty reasonable to believe that they make more money from subscriptions than they would from advertising, and that they're more likely to be able to afford to produce high quality articles with more money than with less.