I would also like to know about the quality/valuation diffrence between ex goog startups and non ex goog startups. May be ex googlers build better startups? a lot of ex paypalers made solid new companies. Had paypal acquired them I don't think we'd be criticizing them.
However as Google is a publicly traded company, if I were a shareholder I would want to know if my money is being paid to friends of decision makers.
It would be interesting to see how many of Google's acquisitions have involved ex-Googlers?