I regularly compile data about start-ups and in particular about how equity is allocated to founders, employees (through stock options), independant board members and investors (through preferred shares). I have now more than 400 such cases (see below the full list). What is interesting is to look at some statistics by geography, by field and by period of foundation. here they are:

There would be a lot to say, but I prefer you build your own opinion…

Equity Structure in 401+ Start-ups by Herve Lebret on Scribd