In our previous lives in media production, it's all about youth and energy, and seems to becoming even more so, especially in advertising where ideas are often driven by an innate understanding of the power of technology, and how it can be harnessed to create and realise ideas in completely different ways. I know many over 40's colleagues who think computers are for Googling and email (you know who you are), and that's the limit of their technological skill. These people are almost speaking a different language to the 25 year old directors they're working with, who are breaking all the so called 'rules'.
At one point, many HNer's, after years of struggle and work on projects will become 'the old guys', and still drawing on their entrepreneurial skills and drive. Some will have made that Big Deal with all the $$$, but very many will still be pushing their next idea after a series of almost made it's. I think it's important for young start-ups to project that image of themselves in the future, that they might be looking at 20 years of pushing and fighting to get the success they're striving for.