Culture isn't a great answer to throw around when people are asking hard questions about a program that is the financial backbone of a company. In fact its downright snooty to presume that allegations like this stem from folks who have experienced a different corporate culture. People generally get to know what a company's culture really is like from the folks who leave that company. And there are tons of those folks from Google. The point is, whether you appreciate Google's internal culture of candour or not or its lack of silos, that's just not the way to respond to allegations regarding the way Google makes serious profits.