None of these were SV startups with all the stereotypes that accrue to them. It's true that it's harder for big companies to innovate, but you can't say, "Only SV startups build products that change the world, ergo SV startups change world culture"
I believe the question is: "Do the cultural values of a company like Google impact the values (or culture) of their customers through their use of Google's products?"
I would argue that no, they do not. People want to find out where they can buy the cheapest dog food or recipes for something they need to cook. For sure, Google's may present articles that they might not otherwise see, but that's as far as I believe this goes; this other content need not be consistent with Google's values (very often it isn't). Ditto with GMail, I wouldn't think the culture of Google, as expressed through GMail, will make much of an impact on their customers at large.
But Exxon or Halliburton couldn't have developed these products. They wouldn't even try and fail to develop these kinds of products.