Earlier quoted context omitted.
You can't question either Eric Ries's or Steve Blank's chops as entrepreneurs. Read this piece we did at Xconomy, which includes the story of how Steve and Eric met and influenced one another: http://www.xconomy.com/san-francisco/2011/07/06/eric-ries-th...
Nice write-up, but their history/bio still doesn't give me any proof of their success in the startup world, outside of marketing lean startup stuff to other entrepreneurs, ironically. Taking advice from failed entrepreneurs is dangerous and a waste of time, I think.
http://en.wikipedia.org/wiki/IMVU
http://en.wikipedia.org/wiki/Steve_Blank
They are both the real deal - especially Steve Blank, who did multiple companies.