[kartickv]

8 vs 11 is too small a sample size to say either way. It may very well be that a couple of these startups succeeded due to their business model / luck / sector / whatever which wouldn't apply to the next startup.

If it were 0 vs 11, that would mean something, but 8 vs 11 is too close.

Instead of counting unicorns, we should count the number of successful exits, such as acquisitions. Or, second best, the number of companies that reached (say) series C funding.