If anything I'd say it's overrated. For all the hype, how many Lean Startup success stories do we have vs. VC-backed, burn-money-for-time plays? How many IPOs in the past 10 years have come from turning old doors into desks instead of going to Costco?

There's obviously no one way to success in entrepreneurship. If times are lean and you have no easy access to money, sure, being frugal is phenomenal. If you're a 40 year old PM at Facebook thinking of doing your own thing? Pay to delegate every single thing you can. All in all, play to your strengths.