I'm surprised to see "platforms" as Win: 41%, Desktop Linux: 33%, Mac: 18.4%. Presumably this question was about the machine you use to develop software on. The reason I'm surprised has nothing to do with any advocacy. It's just that whenever I look around at a non-Apple dev conference in the US (Web, for example), it looks as though fewer than 1/5 of the machines are NON-Macs, while the answer to the question above…
StackOverflow is more tilted towards "dark matter developers"[1] than many other places - the unseen, the unheralded, those that are toiling away at LOB apps inside of companies. Often they're using PHP or Java or C#, or god help them, Visual Basic, still. Those are not necessarily the kind of people that are going to be seen at dev conferences, but there is a huge number of them, and they use StackOverflow hard. [1]…
I think that is a really important thing to bear in mind when reading Hacker News, or pretty much any online venue. People who contribute or even post comments are not the majority. SO rates me in the top 20% of Ruby developers, because I answered a few questions on the site.