Yes. They stopped doing that long ago. From their frontpage video: "While not intended to replace every meal, Soylent can replace any meal". And in text: "If you’ve ever wasted time and energy trying to decide what to eat for lunch, or have been too busy to eat a proper meal" And basically everyone I see in forums will say that they don't advice on a 100% Soylent diet.

Disclaimer: I'm a firm believer that we need to change our consumption habits. Soylent is a way to make an impact, even if it is only used once a week.