From what I figure there are two benefits of widely publicized start ups: 1. Interest/brand recognition interesting tech naturally generates. 2. Attracting hi

From what I figure there are two benefits of widely publicized start ups: 1. Interest/brand recognition interesting tech naturally generates. 2. Attracting high profile employees that are interested in your product. So going stealth assumes you got a handle on both of those problems. If not, I think, chances of success are slim.