100% false.
100% false.
I interpret the point as being: the monetary outcome of a startup for the employee is a function of their individual contribution (which is what I think the author means by being "instrumental"), plus the contribution of the founders and other employees, plus luck. The magnitude of the individual contribution is small relative to the other factors, so it's difficult to say that a successful startup employee "deserves" a windfall and an unsuccessful one doesn't. The lower the correlation between individual contribution and monetary outcome, the less options should matter for motivating early employees.
So I guess it hinges on how you define "instrumental" and "almost none". It's a tautology to say that "instrumental" means "they contributed to the effort", so I would say "instrumental" means "it seems like no one else could have done it" and "almost none" means less than 5%. If you had to take a wild guess about Google, what percentage of that 1,000 would you estimate were instrumental? Furthermore, presumably there are more Google millionaires now, 10 years later. I wonder what percentage of those were also instrumental in Google's success?
[0] http://www.nytimes.com/2007/11/12/technology/12google.html
Don't get me wrong, I don't mean to say that many employees at companies like Google are not brilliant or not extremely effective in their work, but "no one else could have done it" is a useless test that relies on mythologizing people. The way I figure out, the people getting rich (as employees) are those that: a) took the risk to get in early enough, b) performed their jobs competently enough to stay long term and to give the company a chance to succeed, c) got lucky enough in that all the imponderable external factors also resulted in that particular company succeeding. That doesn't mean they weren't "instrumental", in the sense of being the people who actually happened to get the work done. But that's different from "irreplaceable".
At the startup I worked at, a bunch of people made some money based on equity, and while it wasn't necessarily a perfect correlation between equity and contributions (and how could it be?), roughly speaking, equity and "having instrumental roles in the success" were certainly highly correlated.
I'm not even sure what the idea is here. Are early employees generally considered undeserving of the success of their companies? Who is deserving? The founders? Later employees?