Not at all. These guys were late to the game and built a Top 10 application: http://www.highscalability.com/friends-sale-architecture-300-million-page-view-mon

Not at all. These guys were late to the game and built a Top 10 application: http://www.highscalability.com/friends-sale-architecture-300-million-page-view-month-facebook-ror-app http://www.highscalability.com/friends-sale-architecture-300... Being early was a huge benefit, but it certainly won't prevent you from building a viral app if it's something people will use.