The way you phrase this reminds me of what I studied happening in the hedge fund world, in that some of the 'top performer' funds only out-performed the market due to insider trading. Galleon (Raj - convicted), SAC (sanctioned), and probably a handful more that got spooked out of the avenue of enrichment. It almost seems - almost - like there may be a similar insular community whereby those who feel like piling in will only do so when it's a consensus movement play.
You know, kind of like how Bernie Madoff took hundreds of millions from established, regulated entities because the "word on the street" was he was, well, just front-running. Though illegal, that was an acceptable explanation for the consistent returns that prolonged a dirty business model. Well, we've learned how that all turned out.
Is there a moral to the story? Probably, but I'm not sure the startup culture would like to have to start questioning "angels" and their cohorts. YMMV.