rescuetime can only provide this level of insight for people that use their software, and that will incur a bias, thats fairly obvious and should go without saying, or at least repeating constantly.
Cheers guys for some really interesting blog posts, some of us appreciate them.
However I disagree that they can go without mentioning the sample bias, especially in this case of corporate vs cloud apps. Yes to HN readers (a lot of whom are working on cloud startups) it's obvious. However to the wider community of people who might be reading that blog, that is not necessarily obvious.