Earlier quoted context omitted.
Forbes interviewed DPR (Ulbricht or not) in August. "Roberts isn’t actually the site’s founder, he revealed in our interview. He credits Silk Road’s creation to another, even more secretive entrepreneur whom he declined to tell me anything about and who may have used the “Dread Pirate Roberts” nom de guerre before it was assumed by the person I interviewed." http://www.forbes.com/sites/andygreenberg/2013/08/14/meet-t…
Yeah, he was just saying that to throw people off his trail.
From what I understand, at the time of Silk Road's creation, he was not nearly technically capable of creating a site like it. He seems to have learned enough to administer and update the site, but the initial construction was done by another.