Has anybody looked at the correlations between the stories on TechMeme and HN? My guess is that because of HN's broader scope more of the TechMeme links wind up on HN than the other way around. But it would be interesting to see data related to that ... and also see whether one routinely proceeds the other.
I don't know about that but Techmeme clearly takes HN into account. I've noticed many times where an article makes it to Techmeme without any other blogs linking to it. Every time that's happened I've found the article on the top of the HN page.