To everybody quoting the result that most entrepreneurs are in their 40s: that includes entrepreneurs in clean energy, hardware, other kinds of engineering. I'm

To everybody quoting the result that most entrepreneurs are in their 40s: that includes entrepreneurs in clean energy, hardware, other kinds of engineering. I'm not sure there's a study out there about just software/web entrepreneurs. Vivek Wadhwa's study (http://www.techcrunch.com/2009/09/07/when-it-comes-to-founding-successful-startups-old-guys-rule http://www.techcrunch.com/2009/09/07/when-it-comes-to-foundi..., http://news.ycombinator.com/item?id=874340 http://news.ycombinator.com/item?id=874340 below) doesn't separate industries out.