Well, yes, of course it is. If someone graduated from Oxford or Harvard then the reputation will follow them for the rest of their lives. It’s bizarre really but it’s also so normal that no one ever stops to question it. Same with some companies, e.g Google, they are 100,000 people now, very far from an elite, but work there even for a few months and you will be an ex-Googler for the rest of your life.
Maybe Netflix? The others are just on a level with IBM or HP or MS or whoever now. Big tech companies staffed with average engineers. They are coasting on reputations earned when they were just a few hundred of the best engineers.
Don't know. But you can get better opportunities everywhere with G on your resume over Amazon. Amazon also pays way less and has worse perks in everyway. Google was known to be a great place to work. That legend carries on amongst non tech people.