[garply]

Hi ambition, I was painting with pretty broad strokes, and I did not intend to say Facebook employees are "greedy" (I do not believe I did say that). I meant that the value systems of the people I know in both places tend to be slightly different.

One way to quantify the difference between the two types of engineers (if there is such a difference, as I hypothesize), would be to measure the volume of their open-source work prior to joining the companies. Maybe just number of contributed-to projects X years before joining as a rough estimate? Actually, I'd be interested in seeing that data for employees across the board at the major SV tech companies.