As with the recent post on HN's age/gender, this does not reflect data obtained ~5 months ago through a HN poll [0]. On one hand, the poll probably has some self-selection bias, it is only representative of registered users and it asks "what's your primary OS" rather than "what OS are you using right now". On the other hand, the "date range picker for Twitter Bootstrap" post was probably heavily biased towards people who use Bootstrap and it measures what OS visitors were using when visiting which is not necessarily their primary OS. Anyways, here's the results from the HN poll:
OS Points
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OSX 3252 (40.9%)
Linux 2666 (33.5%)
Windows 1729 (21.7%)
iOS 104 (1.3%)
Android 99 (1.2%)
Other Unix
variant 73 (0.9%)
Chrome OS 20 (0.3%)
Other 15 (0.2%)
