I think the issue here is that for you the correct results set would be reputable domain name providers, whereas for many other people, the howto articles are in fact what they're looking for.
Without having personal search switched on, they need to hedge their bets. (note: not having tried it I don't know how effective the personalized search is)
In general these populist algorithms may tend to skew the results against techies, or those who 'know what they want', in favour of overall increase in perceived quality.
As far as I know there is a human component, and there is definitely significant weight these days towards CTR as determining quality. These would likely just reinforce the populist ranking factors.
One of the underlooked aspects of Google is the sidebar - using the 'fewer shopping sites' and time-based queries can be a huge help to relevance. I've for years used search modifiers (+, .., - etc.) in my initial queries with an expectation of what Google might expect. A search like "Buy Domain Names" still retains a lot of semantic ambiguity that their algorithm has to wrestle with. You have the tools to fix that yourself.
As such I tend to agree with Matt on this. We've just forgotten how bad it was.