There are plenty of myths floating around Silicon Valley, augmented by the legends of hot-headed young Turks such as Steve Jobs or Mark Zuckerberg, that you need to be in your 20s with a rigid mindset and a hefty ego. But they're the outliers, according to an extensive survey conducted by one startup incubator. [...] The results? As you can see in the infographic below, the young Turk thing is a myth. The best entrepreneurs are ones who work in their field first, gaining valuable real-world knowledge and experience for a decade or more. (We heard exactly the same thing from Google's startup acquisition guy).