A lot of the people that frequent HN have remarked on the high techcrunch content and other frequently submitted sites.
The reason for this is that there is a relatively small group of people that all 'race' to get articles from these outlets submitted.
The first one to make it is the one that will get points from all the other submitters, mostly because in their haste to be 'first' they forget to check whether the link has already been submitted.
It's the HN equivalent of the /. meme of 'first post', only with a karma boost as an incentive.
This leads to lots of borderline articles getting lots of time on the homepage, which in turn is a small but persistent factor in crowing out the more interesting stuff.
To protect the guilty and the innocent alike I've removed the usernames from the following report, the sort was by number of points per domain per user, so every line reflects a single individual submitting a certain domain.
So, for instance the first individual has submitted 716(!) links from the same domain (and first!).
