I think this statement is mired in sample bias. What companies are you comparing YC companies to? Other successful companies or a random sample of other startu

I think this statement is mired in sample bias. What companies are you comparing YC companies to? Other successful companies or a random sample of other startups that are non-YC? Particularly with the examples of Microsoft and Google, your analysis is historical. In their pre-public-company days you may have been lured into making the same type of statement in regards to them because any business they were involved in at the time was probably minimally visible from the outside just as it is with many YC companies now. There is a lot going on behind the scenes that you probably don't know about and thus cannot consider. That is the nature of private companies.