I definitely believe that the only reason why Soylent is being successful is because of hype. How does the product they are visioning differ from the food replacement given through a feeding tube? Working in a hospital, I have personally witnessed people with swallowing disabilities living on this stuff for more than a decade!
Bear in mind, this is from a year ago, from early in its development. I'm not positive how much of this is inaccurate, but I know that omega-3 and other ingredients were added to round it out. I'd take this article with a grain of salt.