"Making the World a Happier Place, One Web Site at a Time: Interview with Jakob Nielsen and Marie Tahir," WebReference.com, Oct 2001

At the same time, to get high quality design, you must have usability-directed design where you start out with studying users' needs and let that decide where you're going to go. That more integrated approach, where usability permeates throughout the lifecycle and becomes the way a company designs interfaces, I would say that is exceedingly rare. Basically, it almost never happens that way. I recommend that is the direction things should move because whenever products or websites are designed that way, they become so dramatically superior that they take over and gain some substantial market shares. So it's self-perpetuating.