There's a reason 500 Startups [edited out "he" and replaced with firm name - although he is also a prolific individual angel] tops the league tables for most active early stage investments every year, because they believe a lot of VCs are wrong.
Active investments by VCs since JAN2015 - http://imgur.com/QxVJVgZ
1) my angel investments ($300K portfolio, 2004-2008 vintage): 3 exits (Mint, Mashery, SlideShare) @ $100M+ out of 13 -- roughly 3.5X cash on cash in ~8 years
2) my investments at Founders Fund (~$3M portfolio, 2008-2010): 3 unicorns (Credit Karma, Lyft/ZimRide, Twilio) + 3 large wins (Wildfire, SendGrid, Life360) out of ~40 investments via FF Angel + fbFund -- roughly $50-60M appreciation in value over 7-8 years, >100% Gross IRR
3) 500 Startups main funds: $30M Fund I / 265 companies / 19% Net IRR / 2010-11 vintage, $45M Fund II / 325 companies / 23% Net IRR / 2012-13 vintage -- so far, 2 unicorns (Twilio, Credit Karma), 2 half-unicorns (Ipsy, Udemy), 30+ "centaurs" (>$100M+ value). Fund III is $85M / vintage 2014-15 / 650+ companies -- still pretty early but so far Net IRR trending ~20%
our LPs have been happy with our results so far. my/our track record is likely upper quartile, and at least for my years at Founders Fund top decile. Peter and I may differ in approach & stage, but likely more in agreement than not about the #s, altho he would likely consider or strategy more brute force and inelegant than his. that said, I think made enough money for him at FF & found him 3 unicorns, so hopefully he doesn't think I'm an idiot ;)
(Yes, can I have access to pitchbook?)
It's analogous to someone observing, "Over long time periods, companies that have low PE's outperform companies with high PEs" Warren Buffett picks individual companies with high PEs, while David Booth creates and index for all of them. Both have found ways to become billionaires.
It's a secret to the majority of the people that are the market for a book like that. As opposed to those of us who are on top of startups who found out that information many many years ago.