Ask HN: How does grad school help or hinder being a successful entrepreneur?

Doing a PhD has often been compared with running a startup, in the sense that one is constantly working -- there is no real weekend or vacation. As a recent PhD and an aspiring entrepreneur, I am looking for advice about how having been through grad school can be an asset or a hinderance when doing a startup. To set some context, I currently work at the research group of a large technology company, where I have the freedom to work on pretty much whatever I want, publish papers, build prototypes, dabble in new area, etc.. How valuable is it to first transition to a startup before founding my own?